64145757 has 16 divisors (see below), whose sum is σ = 93372608. Its totient is φ = 38931840.

The previous prime is 64145749. The next prime is 64145773. The reversal of 64145757 is 75754146.

It is not a de Polignac number, because 64145757 - 2³ = 64145749 is a prime.

It is a super-2 number, since 2×64145757² = 8229356282206098, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64145717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8419 + ... + 14112.

It is an arithmetic number, because the mean of its divisors is an integer number (5835788).

Almost surely, 2^64145757 is an apocalyptic number.

It is an amenable number.

64145757 is a deficient number, since it is larger than the sum of its proper divisors (29226851).

64145757 is a wasteful number, since it uses less digits than its factorization.

64145757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22620.

The product of its digits is 117600, while the sum is 39.

The square root of 64145757 is about 8009.1046316052. The cubic root of 64145757 is about 400.3034301838.

The spelling of 64145757 in words is "sixty-four million, one hundred forty-five thousand, seven hundred fifty-seven".