57497733391 has 4 divisors (see below), whose sum is σ = 65711695312. Its totient is φ = 49283771472.

The previous prime is 57497733347. The next prime is 57497733409. The reversal of 57497733391 is 19333779475.

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

It is a cyclic number.

It is not a de Polignac number, because 57497733391 - 2⁹ = 57497732879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57497733331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4106980950 + ... + 4106980963.

It is an arithmetic number, because the mean of its divisors is an integer number (16427923828).

Almost surely, 2^57497733391 is an apocalyptic number.

57497733391 is a deficient number, since it is larger than the sum of its proper divisors (8213961921).

57497733391 is an equidigital number, since it uses as much as digits as its factorization.

57497733391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213961920.

The product of its digits is 15002820, while the sum is 58.

The spelling of 57497733391 in words is "fifty-seven billion, four hundred ninety-seven million, seven hundred thirty-three thousand, three hundred ninety-one".