56116670987 has 4 divisors (see below), whose sum is σ = 60433338000. Its totient is φ = 51800003976.

The previous prime is 56116670963. The next prime is 56116670993. The reversal of 56116670987 is 78907661165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56116670987 - 2¹⁶ = 56116605451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56116670917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158333487 + ... + 2158333512.

It is an arithmetic number, because the mean of its divisors is an integer number (15108334500).

Almost surely, 2^56116670987 is an apocalyptic number.

56116670987 is a deficient number, since it is larger than the sum of its proper divisors (4316667013).

56116670987 is a wasteful number, since it uses less digits than its factorization.

56116670987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316667012.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 56116670987 in words is "fifty-six billion, one hundred sixteen million, six hundred seventy thousand, nine hundred eighty-seven".