312307720777 has 8 divisors (see below), whose sum is σ = 336336194376. Its totient is φ = 288279933312.

The previous prime is 312307720771. The next prime is 312307720841. The reversal of 312307720777 is 777027703213.

It can be written as a sum of positive squares in 4 ways, for example, as 31514770576 + 280792950201 = 177524^2 + 529899^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312307720777 is a prime.

It is a super-2 number, since 2×312307720777² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312307720771) 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, 1152243 + ... + 1397239.

It is an arithmetic number, because the mean of its divisors is an integer number (42042024297).

Almost surely, 2^312307720777 is an apocalyptic number.

It is an amenable number.

312307720777 is a deficient number, since it is larger than the sum of its proper divisors (24028473599).

312307720777 is a wasteful number, since it uses less digits than its factorization.

312307720777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343067.

The product of its (nonzero) digits is 605052, while the sum is 46.

The spelling of 312307720777 in words is "three hundred twelve billion, three hundred seven million, seven hundred twenty thousand, seven hundred seventy-seven".