1375631387625 has 32 divisors (see below), whose sum is σ = 2497146148224. Its totient is φ = 666972792000.

The previous prime is 1375631387621. The next prime is 1375631387687. The reversal of 1375631387625 is 5267831365731.

It is not a de Polignac number, because 1375631387625 - 2² = 1375631387621 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1375631387621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166739074 + ... + 166747323.

It is an arithmetic number, because the mean of its divisors is an integer number (78035817132).

Almost surely, 2^{1375631387625} is an apocalyptic number.

1375631387625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1375631387625 is a deficient number, since it is larger than the sum of its proper divisors (1121514760599).

1375631387625 is a wasteful number, since it uses less digits than its factorization.

1375631387625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333486426 (or 333486416 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 57.

The spelling of 1375631387625 in words is "one trillion, three hundred seventy-five billion, six hundred thirty-one million, three hundred eighty-seven thousand, six hundred twenty-five".