64921352 has 8 divisors (see below), whose sum is σ = 121727550. Its totient is φ = 32460672.

The previous prime is 64921349. The next prime is 64921369. The reversal of 64921352 is 25312946.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45508516 + 19412836 = 6746^2 + 4406^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4057577 + ... + 4057592.

Almost surely, 2^64921352 is an apocalyptic number.

It is an amenable number.

64921352 is a deficient number, since it is larger than the sum of its proper divisors (56806198).

64921352 is a wasteful number, since it uses less digits than its factorization.

64921352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8115175 (or 8115171 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 64921352 is about 8057.3787300834. The cubic root of 64921352 is about 401.9103452615.

The spelling of 64921352 in words is "sixty-four million, nine hundred twenty-one thousand, three hundred fifty-two".