15170140856 has 64 divisors (see below), whose sum is σ = 31099084800. Its totient is φ = 6895663488.

The previous prime is 15170140847. The next prime is 15170140901. The reversal of 15170140856 is 65804107151.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1831781 + ... + 1840043.

It is an arithmetic number, because the mean of its divisors is an integer number (485923200).

Almost surely, 2^15170140856 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 15170140856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15549542400).

15170140856 is an abundant number, since it is smaller than the sum of its proper divisors (15928943944).

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

15170140856 is a wasteful number, since it uses less digits than its factorization.

15170140856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8548 (or 8544 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 15170140856 in words is "fifteen billion, one hundred seventy million, one hundred forty thousand, eight hundred fifty-six".