1685624397696 has 64 divisors (see below), whose sum is σ = 4974933128400. Its totient is φ = 561874798080.

The previous prime is 1685624397683. The next prime is 1685624397703. The reversal of 1685624397696 is 6967934265861.

1685624397696 is a `hidden beast` number, since 1 + 68 + 5 + 62 + 439 + 76 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1685624397696² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 243865815 + ... + 243872726.

Almost surely, 2^{1685624397696} is an apocalyptic number.

1685624397696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1685624397696 is an abundant number, since it is smaller than the sum of its proper divisors (3289308730704).

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

1685624397696 is an equidigital number, since it uses as much as digits as its factorization.

1685624397696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487738564 (or 487738546 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 72.

The spelling of 1685624397696 in words is "one trillion, six hundred eighty-five billion, six hundred twenty-four million, three hundred ninety-seven thousand, six hundred ninety-six".