25531276397328 has 480 divisors, whose sum is σ = 82653103862784. Its totient is φ = 7296376209408.

The previous prime is 25531276397273. The next prime is 25531276397329. The reversal of 25531276397328 is 82379367213552.

25531276397328 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 1 + 276 + 39 + 7 + 328 = 666.

It is not an unprimeable number, because it can be changed into a prime (25531276397329) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 221293225 + ... + 221408567.

Almost surely, 2^{25531276397328} 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 25531276397328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41326551931392).

25531276397328 is an abundant number, since it is smaller than the sum of its proper divisors (57121827465456).

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

25531276397328 is a wasteful number, since it uses less digits than its factorization.

25531276397328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115543 (or 115534 counting only the distinct ones).

The product of its digits is 114307200, while the sum is 63.

The spelling of 25531276397328 in words is "twenty-five trillion, five hundred thirty-one billion, two hundred seventy-six million, three hundred ninety-seven thousand, three hundred twenty-eight".