25551015552 has 192 divisors, whose sum is σ = 75995393760. Its totient is φ = 8234956800.

The previous prime is 25551015499. The next prime is 25551015557.

25551015552 is a `hidden beast` number, since 2 + 5 + 551 + 0 + 1 + 55 + 52 = 666.

25551015552 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25551015557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5000583 + ... + 5005689.

Almost surely, 2^25551015552 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 25551015552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37997696880).

25551015552 is an abundant number, since it is smaller than the sum of its proper divisors (50444378208).

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

25551015552 is a wasteful number, since it uses less digits than its factorization.

25551015552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271 (or 5256 counting only the distinct ones).

The product of its (nonzero) digits is 62500, while the sum is 36.

The spelling of 25551015552 in words is "twenty-five billion, five hundred fifty-one million, fifteen thousand, five hundred fifty-two".