64156645 has 32 divisors (see below), whose sum is σ = 92049408. Its totient is φ = 42009408.

The previous prime is 64156633. The next prime is 64156661. The reversal of 64156645 is 54665146.

It is not a de Polignac number, because 64156645 - 2⁷ = 64156517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70282 + ... + 71188.

It is an arithmetic number, because the mean of its divisors is an integer number (2876544).

Almost surely, 2^64156645 is an apocalyptic number.

It is an amenable number.

64156645 is a deficient number, since it is larger than the sum of its proper divisors (27892763).

64156645 is a wasteful number, since it uses less digits than its factorization.

64156645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009.

The product of its digits is 86400, while the sum is 37.

The square root of 64156645 is about 8009.7843291814. The cubic root of 64156645 is about 400.3260778608.

The spelling of 64156645 in words is "sixty-four million, one hundred fifty-six thousand, six hundred forty-five".