2156894742 has 32 divisors (see below), whose sum is σ = 4402719360. Its totient is φ = 704231360.

The previous prime is 2156894741. The next prime is 2156894743. The reversal of 2156894742 is 2474986512.

It is an interprime number because it is at equal distance from previous prime (2156894741) and next prime (2156894743).

It is a junction number, because it is equal to n+sod(n) for n = 2156894691 and 2156894700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156894741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88633 + ... + 110315.

It is an arithmetic number, because the mean of its divisors is an integer number (137584980).

Almost surely, 2^2156894742 is an apocalyptic number.

2156894742 is an abundant number, since it is smaller than the sum of its proper divisors (2245824618).

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

2156894742 is a wasteful number, since it uses less digits than its factorization.

2156894742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22028.

The product of its digits is 967680, while the sum is 48.

The square root of 2156894742 is about 46442.3808821210. The cubic root of 2156894742 is about 1292.0410654962.

The spelling of 2156894742 in words is "two billion, one hundred fifty-six million, eight hundred ninety-four thousand, seven hundred forty-two".