537640457 has 4 divisors (see below), whose sum is σ = 537734016. Its totient is φ = 537546900.

The previous prime is 537640447. The next prime is 537640469. The reversal of 537640457 is 754046735.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537640457 is a prime.

It is a super-2 number, since 2×537640457² = 578114522006337698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537640417) 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, 37553 + ... + 49854.

It is an arithmetic number, because the mean of its divisors is an integer number (134433504).

Almost surely, 2^537640457 is an apocalyptic number.

It is an amenable number.

537640457 is a deficient number, since it is larger than the sum of its proper divisors (93559).

537640457 is an equidigital number, since it uses as much as digits as its factorization.

537640457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93558.

The product of its (nonzero) digits is 352800, while the sum is 41.

The square root of 537640457 is about 23187.0752144379. The cubic root of 537640457 is about 813.1374819380.

The spelling of 537640457 in words is "five hundred thirty-seven million, six hundred forty thousand, four hundred fifty-seven".