56777081 has 4 divisors (see below), whose sum is σ = 57985152. Its totient is φ = 55569012.

The previous prime is 56777051. The next prime is 56777101. The reversal of 56777081 is 18077765.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56777081 - 2¹⁸ = 56514937 is a prime.

It is a super-2 number, since 2×56777081² = 6447273853761122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56777011) 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, 603965 + ... + 604058.

It is an arithmetic number, because the mean of its divisors is an integer number (14496288).

Almost surely, 2^56777081 is an apocalyptic number.

It is an amenable number.

56777081 is a deficient number, since it is larger than the sum of its proper divisors (1208071).

56777081 is a wasteful number, since it uses less digits than its factorization.

56777081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208070.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 56777081 is about 7535.0568013785. The cubic root of 56777081 is about 384.3477594197.

The spelling of 56777081 in words is "fifty-six million, seven hundred seventy-seven thousand, eighty-one".