15256997448 has 384 divisors, whose sum is σ = 50241669120. Its totient is φ = 3781008000.

The previous prime is 15256997407. The next prime is 15256997477. The reversal of 15256997448 is 84479965251.

It is a super-2 number, since 2×15256997448² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15256997391 and 15256997400.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 214887253 + ... + 214887323.

It is an arithmetic number, because the mean of its divisors is an integer number (130837680).

Almost surely, 2^15256997448 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 15256997448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25120834560).

15256997448 is an abundant number, since it is smaller than the sum of its proper divisors (34984671672).

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

15256997448 is a wasteful number, since it uses less digits than its factorization.

15256997448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 125 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 60.

The spelling of 15256997448 in words is "fifteen billion, two hundred fifty-six million, nine hundred ninety-seven thousand, four hundred forty-eight".