57491811 has 24 divisors (see below), whose sum is σ = 89704160. Its totient is φ = 35271936.

The previous prime is 57491767. The next prime is 57491827. The reversal of 57491811 is 11819475.

57491811 is a `hidden beast` number, since 574 + 9 + 1 + 81 + 1 = 666.

57491811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57491811 - 2⁷ = 57491683 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (57491911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56475 + ... + 57483.

Almost surely, 2^57491811 is an apocalyptic number.

57491811 is a deficient number, since it is larger than the sum of its proper divisors (32212349).

57491811 is a wasteful number, since it uses less digits than its factorization.

57491811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1512 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 57491811 is about 7582.3354581554. The cubic root of 57491811 is about 385.9538075501.

The spelling of 57491811 in words is "fifty-seven million, four hundred ninety-one thousand, eight hundred eleven".