64654818816 has 80 divisors (see below), whose sum is σ = 196850865024. Its totient is φ = 18472802304.

The previous prime is 64654818803. The next prime is 64654818847. The reversal of 64654818816 is 61881845646.

It is a super-2 number, since 2×64654818816² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995890 + ... + 3017393.

Almost surely, 2^64654818816 is an apocalyptic number.

It is an amenable number.

64654818816 is an abundant number, since it is smaller than the sum of its proper divisors (132196046208).

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

64654818816 is an equidigital number, since it uses as much as digits as its factorization.

64654818816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6013311 (or 6013295 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 57.

The spelling of 64654818816 in words is "sixty-four billion, six hundred fifty-four million, eight hundred eighteen thousand, eight hundred sixteen".