3257157156 has 144 divisors (see below), whose sum is σ = 9055851840. Its totient is φ = 902442240.

The previous prime is 3257157151. The next prime is 3257157173. The reversal of 3257157156 is 6517517523.

It is not an unprimeable number, because it can be changed into a prime (3257157151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1380730 + ... + 1383086.

It is an arithmetic number, because the mean of its divisors is an integer number (62887860).

Almost surely, 2^3257157156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3257157156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4527925920).

3257157156 is an abundant number, since it is smaller than the sum of its proper divisors (5798694684).

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

3257157156 is a wasteful number, since it uses less digits than its factorization.

3257157156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442 (or 2421 counting only the distinct ones).

The product of its digits is 220500, while the sum is 42.

The square root of 3257157156 is about 57071.5091442306. The cubic root of 3257157156 is about 1482.3345727197.

The spelling of 3257157156 in words is "three billion, two hundred fifty-seven million, one hundred fifty-seven thousand, one hundred fifty-six".