64157944 has 16 divisors (see below), whose sum is σ = 120445920. Its totient is φ = 32039040.

The previous prime is 64157939. The next prime is 64157953. The reversal of 64157944 is 44975146.

It is a junction number, because it is equal to n+sod(n) for n = 64157897 and 64157906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2497 + ... + 11599.

It is an arithmetic number, because the mean of its divisors is an integer number (7527870).

Almost surely, 2^64157944 is an apocalyptic number.

It is an amenable number.

64157944 is a deficient number, since it is larger than the sum of its proper divisors (56287976).

64157944 is a wasteful number, since it uses less digits than its factorization.

64157944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990 (or 9986 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 64157944 is about 8009.8654170966. The cubic root of 64157944 is about 400.3287796858.

It can be divided in two parts, 641 and 57944, that added together give a palindrome (58585).

The spelling of 64157944 in words is "sixty-four million, one hundred fifty-seven thousand, nine hundred forty-four".