64923608936 has 8 divisors (see below), whose sum is σ = 121731766770. Its totient is φ = 32461804464.

The previous prime is 64923608933. The next prime is 64923608989. The reversal of 64923608936 is 63980632946.

It can be written as a sum of positive squares in only one way, i.e., 53171748100 + 11751860836 = 230590^2 + 108406^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (64923608933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4057725551 + ... + 4057725566.

Almost surely, 2^64923608936 is an apocalyptic number.

It is an amenable number.

64923608936 is a deficient number, since it is larger than the sum of its proper divisors (56808157834).

64923608936 is a wasteful number, since it uses less digits than its factorization.

64923608936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8115451123 (or 8115451119 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 64923608936 in words is "sixty-four billion, nine hundred twenty-three million, six hundred eight thousand, nine hundred thirty-six".