64158816 has 48 divisors (see below), whose sum is σ = 178328304. Its totient is φ = 20127744.

The previous prime is 64158811. The next prime is 64158821. The reversal of 64158816 is 61885146.

It is an interprime number because it is at equal distance from previous prime (64158811) and next prime (64158821).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64158811) 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, 18025 + ... + 21288.

It is an arithmetic number, because the mean of its divisors is an integer number (3715173).

Almost surely, 2^64158816 is an apocalyptic number.

It is an amenable number.

64158816 is an abundant number, since it is smaller than the sum of its proper divisors (114169488).

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

64158816 is a wasteful number, since it uses less digits than its factorization.

64158816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39343 (or 39335 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 64158816 is about 8009.9198497863. The cubic root of 64158816 is about 400.3305933615.

The spelling of 64158816 in words is "sixty-four million, one hundred fifty-eight thousand, eight hundred sixteen".