2156157760 has 56 divisors (see below), whose sum is σ = 5145182496. Its totient is φ = 860643840.

The previous prime is 2156157739. The next prime is 2156157761. The reversal of 2156157760 is 677516512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156157761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150259 + ... + 163981.

Almost surely, 2^2156157760 is an apocalyptic number.

2156157760 is a gapful number since it is divisible by the number (20) 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 2156157760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2572591248).

2156157760 is an abundant number, since it is smaller than the sum of its proper divisors (2989024736).

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

2156157760 is a wasteful number, since it uses less digits than its factorization.

2156157760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14231 (or 14221 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 2156157760 is about 46434.4458349618. The cubic root of 2156157760 is about 1291.8938910324.

The spelling of 2156157760 in words is "two billion, one hundred fifty-six million, one hundred fifty-seven thousand, seven hundred sixty".