57769561 has 4 divisors (see below), whose sum is σ = 57903412. Its totient is φ = 57635712.

The previous prime is 57769549. The next prime is 57769567. The reversal of 57769561 is 16596775.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17065161 + 40704400 = 4131^2 + 6380^2 .

It is a cyclic number.

It is not a de Polignac number, because 57769561 - 2⁷ = 57769433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57769567) 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, 66276 + ... + 67141.

It is an arithmetic number, because the mean of its divisors is an integer number (14475853).

Almost surely, 2^57769561 is an apocalyptic number.

It is an amenable number.

57769561 is a deficient number, since it is larger than the sum of its proper divisors (133851).

57769561 is a wasteful number, since it uses less digits than its factorization.

57769561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133850.

The product of its digits is 396900, while the sum is 46.

The square root of 57769561 is about 7600.6289871299. The cubic root of 57769561 is about 386.5743394140.

The spelling of 57769561 in words is "fifty-seven million, seven hundred sixty-nine thousand, five hundred sixty-one".