64806317016 has 32 divisors (see below), whose sum is σ = 185160906240. Its totient is φ = 18516090528.

The previous prime is 64806316951. The next prime is 64806317041. The reversal of 64806317016 is 61071360846.

It is a super-2 number, since 2×64806317016² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 192875776 + ... + 192876111.

It is an arithmetic number, because the mean of its divisors is an integer number (5786278320).

Almost surely, 2^64806317016 is an apocalyptic number.

It is an amenable number.

64806317016 is an abundant number, since it is smaller than the sum of its proper divisors (120354589224).

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

64806317016 is a wasteful number, since it uses less digits than its factorization.

64806317016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385751903 (or 385751899 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 64806317016 in words is "sixty-four billion, eight hundred six million, three hundred seventeen thousand, sixteen".