312640777667 has 8 divisors (see below), whose sum is σ = 317225150640. Its totient is φ = 308064556800.

The previous prime is 312640777663. The next prime is 312640777741. The reversal of 312640777667 is 766777046213.

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 312640777667 - 2² = 312640777663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312640777663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1960742 + ... + 2114187.

It is an arithmetic number, because the mean of its divisors is an integer number (39653143830).

Almost surely, 2^312640777667 is an apocalyptic number.

312640777667 is a deficient number, since it is larger than the sum of its proper divisors (4584372973).

312640777667 is a wasteful number, since it uses less digits than its factorization.

312640777667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076053.

The product of its (nonzero) digits is 12446784, while the sum is 56.

The spelling of 312640777667 in words is "three hundred twelve billion, six hundred forty million, seven hundred seventy-seven thousand, six hundred sixty-seven".