25521166112552 has 64 divisors (see below), whose sum is σ = 52286976921600. Its totient is φ = 11581747200000.

The previous prime is 25521166112549. The next prime is 25521166112579.

It is a happy number.

25521166112552 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 135080552 + ... + 135269352.

It is an arithmetic number, because the mean of its divisors is an integer number (816984014400).

Almost surely, 2^{25521166112552} is an apocalyptic number.

25521166112552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25521166112552 is an abundant number, since it is smaller than the sum of its proper divisors (26765810809048).

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

25521166112552 is a wasteful number, since it uses less digits than its factorization.

25521166112552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191298 (or 191294 counting only the distinct ones).

The product of its digits is 360000, while the sum is 44.

It can be divided in two parts, 2552116 and 6112552, that added together give a palindrome (8664668).

The spelling of 25521166112552 in words is "twenty-five trillion, five hundred twenty-one billion, one hundred sixty-six million, one hundred twelve thousand, five hundred fifty-two".