312205399426368 has 84 divisors (see below), whose sum is σ = 1022720465197600. Its totient is φ = 89201542692096.

The previous prime is 312205399426321. The next prime is 312205399426379. The reversal of 312205399426368 is 863624993502213.

It is a happy number.

312205399426368 is a `hidden beast` number, since 3 + 1 + 2 + 2 + 0 + 539 + 94 + 2 + 6 + 3 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×312205399426368² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38715943318 + ... + 38715951381.

Almost surely, 2^{312205399426368} is an apocalyptic number.

It is an amenable number.

312205399426368 is an abundant number, since it is smaller than the sum of its proper divisors (710515065771232).

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

312205399426368 is a wasteful number, since it uses less digits than its factorization.

312205399426368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77431894724 (or 77431894711 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 63.

The spelling of 312205399426368 in words is "three hundred twelve trillion, two hundred five billion, three hundred ninety-nine million, four hundred twenty-six thousand, three hundred sixty-eight".