56606781 has 48 divisors (see below), whose sum is σ = 97251840. Its totient is φ = 28451520.

The previous prime is 56606779. The next prime is 56606789. The reversal of 56606781 is 18760665.

It is not a de Polignac number, because 56606781 - 2¹ = 56606779 is a prime.

It is a super-2 number, since 2×56606781² = 6408655310363922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56606789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 316150 + ... + 316328.

It is an arithmetic number, because the mean of its divisors is an integer number (2026080).

Almost surely, 2^56606781 is an apocalyptic number.

It is an amenable number.

56606781 is a deficient number, since it is larger than the sum of its proper divisors (40645059).

56606781 is a wasteful number, since it uses less digits than its factorization.

56606781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 56606781 is about 7523.7478027908. The cubic root of 56606781 is about 383.9630973109.

The spelling of 56606781 in words is "fifty-six million, six hundred six thousand, seven hundred eighty-one".