64522690 has 16 divisors (see below), whose sum is σ = 116328960. Its totient is φ = 25767280.

The previous prime is 64522663. The next prime is 64522693. The reversal of 64522690 is 9622546.

It is a super-2 number, since 2×64522690² = 8326355049672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64522693) 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, 1695 + ... + 11485.

It is an arithmetic number, because the mean of its divisors is an integer number (7270560).

Almost surely, 2^64522690 is an apocalyptic number.

64522690 is a deficient number, since it is larger than the sum of its proper divisors (51806270).

64522690 is a wasteful number, since it uses less digits than its factorization.

64522690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10457.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 64522690 is about 8032.6016955903. The cubic root of 64522690 is about 401.0859864155.

The spelling of 64522690 in words is "sixty-four million, five hundred twenty-two thousand, six hundred ninety".