25231621412 has 24 divisors (see below), whose sum is σ = 44447356800. Its totient is φ = 12532646336.

The previous prime is 25231621397. The next prime is 25231621453. The reversal of 25231621412 is 21412613252.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344264 + ... + 411072.

It is an arithmetic number, because the mean of its divisors is an integer number (1851973200).

Almost surely, 2^25231621412 is an apocalyptic number.

It is an amenable number.

25231621412 is a deficient number, since it is larger than the sum of its proper divisors (19215735388).

25231621412 is a wasteful number, since it uses less digits than its factorization.

25231621412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67435 (or 67433 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The spelling of 25231621412 in words is "twenty-five billion, two hundred thirty-one million, six hundred twenty-one thousand, four hundred twelve".