64861808 has 30 divisors (see below), whose sum is σ = 138136992. Its totient is φ = 29481760.

The previous prime is 64861807. The next prime is 64861813. The reversal of 64861808 is 80816846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64861807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14816 + ... + 18687.

Almost surely, 2^64861808 is an apocalyptic number.

It is an amenable number.

64861808 is an abundant number, since it is smaller than the sum of its proper divisors (73275184).

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

64861808 is a wasteful number, since it uses less digits than its factorization.

64861808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33533 (or 33516 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 64861808 is about 8053.6828842462. The cubic root of 64861808 is about 401.7874341341.

The spelling of 64861808 in words is "sixty-four million, eight hundred sixty-one thousand, eight hundred eight".