25431437660 has 12 divisors (see below), whose sum is σ = 53406019128. Its totient is φ = 10172575056.

The previous prime is 25431437641. The next prime is 25431437687. The reversal of 25431437660 is 6673413452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635785922 + ... + 635785961.

It is an arithmetic number, because the mean of its divisors is an integer number (4450501594).

Almost surely, 2^25431437660 is an apocalyptic number.

25431437660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25431437660 is an abundant number, since it is smaller than the sum of its proper divisors (27974581468).

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

25431437660 is a wasteful number, since it uses less digits than its factorization.

25431437660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271571892 (or 1271571890 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 25431437660 in words is "twenty-five billion, four hundred thirty-one million, four hundred thirty-seven thousand, six hundred sixty".