64331650 has 12 divisors (see below), whose sum is σ = 119656962. Its totient is φ = 25732640.

The previous prime is 64331639. The next prime is 64331671. The reversal of 64331650 is 5613346.

It can be written as a sum of positive squares in 3 ways, for example, as 29909961 + 34421689 = 5469^2 + 5867^2 .

It is a super-2 number, since 2×64331650² = 8277122383445000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 643267 + ... + 643366.

Almost surely, 2^64331650 is an apocalyptic number.

64331650 is a deficient number, since it is larger than the sum of its proper divisors (55325312).

64331650 is a wasteful number, since it uses less digits than its factorization.

64331650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286645 (or 1286640 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 64331650 is about 8020.7013409053. The cubic root of 64331650 is about 400.6897474375.

Adding to 64331650 its reverse (5613346), we get a palindrome (69944996).

The spelling of 64331650 in words is "sixty-four million, three hundred thirty-one thousand, six hundred fifty".