25421261612 has 48 divisors (see below), whose sum is σ = 48087164160. Its totient is φ = 11722869312.

The previous prime is 25421261587. The next prime is 25421261639. The reversal of 25421261612 is 21616212452.

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, 2093663 + ... + 2105769.

It is an arithmetic number, because the mean of its divisors is an integer number (1001815920).

Almost surely, 2^25421261612 is an apocalyptic number.

It is an amenable number.

25421261612 is a deficient number, since it is larger than the sum of its proper divisors (22665902548).

25421261612 is a wasteful number, since it uses less digits than its factorization.

25421261612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12950 (or 12948 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The spelling of 25421261612 in words is "twenty-five billion, four hundred twenty-one million, two hundred sixty-one thousand, six hundred twelve".