64161590 has 16 divisors (see below), whose sum is σ = 118177488. Its totient is φ = 25067616.

The previous prime is 64161583. The next prime is 64161607. The reversal of 64161590 is 9516146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74177 + ... + 75036.

It is an arithmetic number, because the mean of its divisors is an integer number (7386093).

Almost surely, 2^64161590 is an apocalyptic number.

64161590 is a deficient number, since it is larger than the sum of its proper divisors (54015898).

64161590 is a wasteful number, since it uses less digits than its factorization.

64161590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149263.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 64161590 is about 8010.0930081991. The cubic root of 64161590 is about 400.3363629040.

The spelling of 64161590 in words is "sixty-four million, one hundred sixty-one thousand, five hundred ninety".