64493457 has 24 divisors (see below), whose sum is σ = 101084256. Its totient is φ = 36465408.

The previous prime is 64493441. The next prime is 64493483. The reversal of 64493457 is 75439446.

64493457 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 64493457 - 2⁴ = 64493441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64493417) 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, 11998 + ... + 16520.

It is an arithmetic number, because the mean of its divisors is an integer number (4211844).

Almost surely, 2^64493457 is an apocalyptic number.

It is an amenable number.

64493457 is a deficient number, since it is larger than the sum of its proper divisors (36590799).

64493457 is a wasteful number, since it uses less digits than its factorization.

64493457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637 (or 4630 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 64493457 is about 8030.7818423862. The cubic root of 64493457 is about 401.0254045343.

It can be divided in two parts, 64 and 493457, that added together give a triangular number (493521 = T₉₉₃).

The spelling of 64493457 in words is "sixty-four million, four hundred ninety-three thousand, four hundred fifty-seven".