64507457 has 4 divisors (see below), whose sum is σ = 73722816. Its totient is φ = 55292100.

The previous prime is 64507447. The next prime is 64507477. The reversal of 64507457 is 75470546.

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 not a de Polignac number, because 64507457 - 2⁴ = 64507441 is a prime.

It is a super-2 number, since 2×64507457² = 8322424017213698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64507457.

It is not an unprimeable number, because it can be changed into a prime (64507427) 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, 4607669 + ... + 4607682.

It is an arithmetic number, because the mean of its divisors is an integer number (18430704).

Almost surely, 2^64507457 is an apocalyptic number.

It is an amenable number.

64507457 is a deficient number, since it is larger than the sum of its proper divisors (9215359).

64507457 is an equidigital number, since it uses as much as digits as its factorization.

64507457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9215358.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 64507457 is about 8031.6534412286. The cubic root of 64507457 is about 401.0544201365.

The spelling of 64507457 in words is "sixty-four million, five hundred seven thousand, four hundred fifty-seven".