57649491 has 24 divisors (see below), whose sum is σ = 86687744. Its totient is φ = 36877680.

The previous prime is 57649481. The next prime is 57649507. The reversal of 57649491 is 19494675.

57649491 is a `hidden beast` number, since 5 + 76 + 494 + 91 = 666.

It is not a de Polignac number, because 57649491 - 2¹⁰ = 57648467 is a prime.

It is a super-3 number, since 3×57649491³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57649481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34620 + ... + 36246.

Almost surely, 2^57649491 is an apocalyptic number.

57649491 is a deficient number, since it is larger than the sum of its proper divisors (29038253).

57649491 is a wasteful number, since it uses less digits than its factorization.

57649491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791 (or 1788 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 57649491 is about 7592.7261902429. The cubic root of 57649491 is about 386.3063310559.

The spelling of 57649491 in words is "fifty-seven million, six hundred forty-nine thousand, four hundred ninety-one".