312640335665 has 8 divisors (see below), whose sum is σ = 428763888960. Its totient is φ = 214381944432.

The previous prime is 312640335629. The next prime is 312640335697. The reversal of 312640335665 is 566533046213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312640335665 - 2¹⁸ = 312640073521 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4466290475 + ... + 4466290544.

It is an arithmetic number, because the mean of its divisors is an integer number (53595486120).

Almost surely, 2^312640335665 is an apocalyptic number.

312640335665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

312640335665 is a deficient number, since it is larger than the sum of its proper divisors (116123553295).

312640335665 is an equidigital number, since it uses as much as digits as its factorization.

312640335665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932581031.

The product of its (nonzero) digits is 1166400, while the sum is 44.

The spelling of 312640335665 in words is "three hundred twelve billion, six hundred forty million, three hundred thirty-five thousand, six hundred sixty-five".