56486781 has 32 divisors (see below), whose sum is σ = 94053120. Its totient is φ = 33244992.

The previous prime is 56486761. The next prime is 56486783. The reversal of 56486781 is 18768465.

It is a happy number.

56486781 is a `hidden beast` number, since 564 + 8 + 6 + 7 + 81 = 666.

It is not a de Polignac number, because 56486781 - 2²² = 52292477 is a prime.

It is a super-2 number, since 2×56486781² = 6381512855483922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56486783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4575 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (2939160).

Almost surely, 2^56486781 is an apocalyptic number.

It is an amenable number.

56486781 is a deficient number, since it is larger than the sum of its proper divisors (37566339).

56486781 is a wasteful number, since it uses less digits than its factorization.

56486781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7042 (or 7036 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 56486781 is about 7515.7688229482. The cubic root of 56486781 is about 383.6915858559.

The spelling of 56486781 in words is "fifty-six million, four hundred eighty-six thousand, seven hundred eighty-one".