1397635475520 has 56 divisors (see below), whose sum is σ = 4437492637824. Its totient is φ = 372702793216.

The previous prime is 1397635475513. The next prime is 1397635475573. The reversal of 1397635475520 is 255745367931.

It is a happy number.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

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, 727934184 + ... + 727936103.

Almost surely, 2^{1397635475520} is an apocalyptic number.

1397635475520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397635475520 is an abundant number, since it is smaller than the sum of its proper divisors (3039857162304).

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

1397635475520 is a wasteful number, since it uses less digits than its factorization.

1397635475520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455870307 (or 1455870297 counting only the distinct ones).

The product of its (nonzero) digits is 23814000, while the sum is 57.

The spelling of 1397635475520 in words is "one trillion, three hundred ninety-seven billion, six hundred thirty-five million, four hundred seventy-five thousand, five hundred twenty".