64791956 has 6 divisors (see below), whose sum is σ = 113385930. Its totient is φ = 32395976.

The previous prime is 64791949. The next prime is 64791967. The reversal of 64791956 is 65919746.

It can be written as a sum of positive squares in only one way, i.e., 39891856 + 24900100 = 6316^2 + 4990^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64791956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8098991 + ... + 8098998.

It is an arithmetic number, because the mean of its divisors is an integer number (18897655).

Almost surely, 2^64791956 is an apocalyptic number.

It is an amenable number.

64791956 is a deficient number, since it is larger than the sum of its proper divisors (48593974).

64791956 is a wasteful number, since it uses less digits than its factorization.

64791956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16197993 (or 16197991 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 64791956 is about 8049.3450665256. The cubic root of 64791956 is about 401.6431492422.

The spelling of 64791956 in words is "sixty-four million, seven hundred ninety-one thousand, nine hundred fifty-six".