2156434944 has 120 divisors (see below), whose sum is σ = 6064712280. Its totient is φ = 680804352.

The previous prime is 2156434939. The next prime is 2156434949. The reversal of 2156434944 is 4494346512.

It is an interprime number because it is at equal distance from previous prime (2156434939) and next prime (2156434949).

It is a junction number, because it is equal to n+sod(n) for n = 2156434896 and 2156434905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156434949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 552552 + ... + 556440.

It is an arithmetic number, because the mean of its divisors is an integer number (50539269).

Almost surely, 2^2156434944 is an apocalyptic number.

2156434944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156434944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3032356140).

2156434944 is an abundant number, since it is smaller than the sum of its proper divisors (3908277336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156434944 is an equidigital number, since it uses as much as digits as its factorization.

2156434944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 3913 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 2156434944 is about 46437.4304198671. The cubic root of 2156434944 is about 1291.9492482948.

The spelling of 2156434944 in words is "two billion, one hundred fifty-six million, four hundred thirty-four thousand, nine hundred forty-four".