64645036 has 12 divisors (see below), whose sum is σ = 113354640. Its totient is φ = 32258000.

The previous prime is 64645027. The next prime is 64645037. The reversal of 64645036 is 63054646.

It is a junction number, because it is equal to n+sod(n) for n = 64644992 and 64645010.

It is not an unprimeable number, because it can be changed into a prime (64645037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13840 + ... + 17911.

It is an arithmetic number, because the mean of its divisors is an integer number (9446220).

Almost surely, 2^64645036 is an apocalyptic number.

It is an amenable number.

64645036 is a deficient number, since it is larger than the sum of its proper divisors (48709604).

64645036 is a wasteful number, since it uses less digits than its factorization.

64645036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32264 (or 32262 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 64645036 is about 8040.2136787526. The cubic root of 64645036 is about 401.3393354461.

The spelling of 64645036 in words is "sixty-four million, six hundred forty-five thousand, thirty-six".