56436681 has 12 divisors (see below), whose sum is σ = 87534672. Its totient is φ = 32249448.

The previous prime is 56436673. The next prime is 56436689. The reversal of 56436681 is 18663465.

It is an interprime number because it is at equal distance from previous prime (56436673) and next prime (56436689).

It is not a de Polignac number, because 56436681 - 2³ = 56436673 is a prime.

It is a super-2 number, since 2×56436681² = 6370197924591522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56436689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191815 + ... + 192108.

It is an arithmetic number, because the mean of its divisors is an integer number (7294556).

Almost surely, 2^56436681 is an apocalyptic number.

It is an amenable number.

56436681 is a deficient number, since it is larger than the sum of its proper divisors (31097991).

56436681 is a wasteful number, since it uses less digits than its factorization.

56436681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383940 (or 383933 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 56436681 is about 7512.4350912337. The cubic root of 56436681 is about 383.5781160372.

The spelling of 56436681 in words is "fifty-six million, four hundred thirty-six thousand, six hundred eighty-one".