64137745 has 16 divisors (see below), whose sum is σ = 88230528. Its totient is φ = 43845120.

The previous prime is 64137737. The next prime is 64137793. The reversal of 64137745 is 54773146.

It is not a de Polignac number, because 64137745 - 2³ = 64137737 is a prime.

It is a super-2 number, since 2×64137745² = 8227300667370050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9505 + ... + 14785.

It is an arithmetic number, because the mean of its divisors is an integer number (5514408).

Almost surely, 2^64137745 is an apocalyptic number.

It is an amenable number.

64137745 is a deficient number, since it is larger than the sum of its proper divisors (24092783).

64137745 is a wasteful number, since it uses less digits than its factorization.

64137745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640.

The product of its digits is 70560, while the sum is 37.

The square root of 64137745 is about 8008.6044352309. The cubic root of 64137745 is about 400.2867631182.

The spelling of 64137745 in words is "sixty-four million, one hundred thirty-seven thousand, seven hundred forty-five".