56306991667 has 8 divisors (see below), whose sum is σ = 57074346432. Its totient is φ = 55543752000.

The previous prime is 56306991623. The next prime is 56306991673. The reversal of 56306991667 is 76619960365.

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 56306991667 - 2⁷ = 56306991539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56306991607) 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, 1001218 + ... + 1055959.

It is an arithmetic number, because the mean of its divisors is an integer number (7134293304).

Almost surely, 2^56306991667 is an apocalyptic number.

56306991667 is a deficient number, since it is larger than the sum of its proper divisors (767354765).

56306991667 is a wasteful number, since it uses less digits than its factorization.

56306991667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057549.

The product of its (nonzero) digits is 11022480, while the sum is 58.

The spelling of 56306991667 in words is "fifty-six billion, three hundred six million, nine hundred ninety-one thousand, six hundred sixty-seven".