57661255 has 4 divisors (see below), whose sum is σ = 69193512. Its totient is φ = 46129000.

The previous prime is 57661249. The next prime is 57661283. The reversal of 57661255 is 55216675.

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

It is not a de Polignac number, because 57661255 - 2¹⁹ = 57136967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5766121 + ... + 5766130.

It is an arithmetic number, because the mean of its divisors is an integer number (17298378).

Almost surely, 2^57661255 is an apocalyptic number.

57661255 is a deficient number, since it is larger than the sum of its proper divisors (11532257).

57661255 is a wasteful number, since it uses less digits than its factorization.

57661255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11532256.

The product of its digits is 63000, while the sum is 37.

The square root of 57661255 is about 7593.5008395338. The cubic root of 57661255 is about 386.3326059256.

It can be divided in two parts, 5766 and 1255, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 57661255 in words is "fifty-seven million, six hundred sixty-one thousand, two hundred fifty-five".