64109646 has 48 divisors (see below), whose sum is σ = 143588016. Its totient is φ = 20659968.

The previous prime is 64109627. The next prime is 64109653. The reversal of 64109646 is 64690146.

64109646 is a `hidden beast` number, since 6 + 4 + 1 + 0 + 9 + 646 = 666.

It is a super-2 number, since 2×64109646² = 8220093420490632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64109646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87096 + ... + 87828.

It is an arithmetic number, because the mean of its divisors is an integer number (2991417).

Almost surely, 2^64109646 is an apocalyptic number.

64109646 is an abundant number, since it is smaller than the sum of its proper divisors (79478370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64109646 is a wasteful number, since it uses less digits than its factorization.

64109646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 64109646 is about 8006.8499423931. The cubic root of 64109646 is about 400.2282988410.

The spelling of 64109646 in words is "sixty-four million, one hundred nine thousand, six hundred forty-six".