31125139680 has 96 divisors (see below), whose sum is σ = 98816385024. Its totient is φ = 8234666496.

The previous prime is 31125139657. The next prime is 31125139697. The reversal of 31125139680 is 8693152113.

It is a tau number, because it is divible by the number of its divisors (96).

It is a zygodrome in base 2.

It is a congruent number.

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, 194332 + ... + 316251.

It is an arithmetic number, because the mean of its divisors is an integer number (1029337344).

Almost surely, 2^31125139680 is an apocalyptic number.

31125139680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31125139680 is an abundant number, since it is smaller than the sum of its proper divisors (67691245344).

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

31125139680 is a wasteful number, since it uses less digits than its factorization.

31125139680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510728 (or 510720 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 31125139680 in words is "thirty-one billion, one hundred twenty-five million, one hundred thirty-nine thousand, six hundred eighty".