56991716 has 12 divisors (see below), whose sum is σ = 104984880. Its totient is φ = 26996040.

The previous prime is 56991713. The next prime is 56991719. The reversal of 56991716 is 61719965.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56991713) and next prime (56991719).

It is not an unprimeable number, because it can be changed into a prime (56991713) 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, 374870 + ... + 375021.

It is an arithmetic number, because the mean of its divisors is an integer number (8748740).

Almost surely, 2^56991716 is an apocalyptic number.

It is an amenable number.

56991716 is a deficient number, since it is larger than the sum of its proper divisors (47993164).

56991716 is a wasteful number, since it uses less digits than its factorization.

56991716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749914 (or 749912 counting only the distinct ones).

The product of its digits is 102060, while the sum is 44.

The square root of 56991716 is about 7549.2857940338. The cubic root of 56991716 is about 384.8314683745.

The spelling of 56991716 in words is "fifty-six million, nine hundred ninety-one thousand, seven hundred sixteen".