64717090 has 16 divisors (see below), whose sum is σ = 117264960. Its totient is φ = 25714800.

The previous prime is 64717049. The next prime is 64717099. The reversal of 64717090 is 9071746.

It is not an unprimeable number, because it can be changed into a prime (64717099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19920 + ... + 22939.

It is an arithmetic number, because the mean of its divisors is an integer number (7329060).

Almost surely, 2^64717090 is an apocalyptic number.

64717090 is a deficient number, since it is larger than the sum of its proper divisors (52547870).

64717090 is a wasteful number, since it uses less digits than its factorization.

64717090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43017.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 64717090 is about 8044.6932819095. The cubic root of 64717090 is about 401.4883923512.

The spelling of 64717090 in words is "sixty-four million, seven hundred seventeen thousand, ninety".