64726678084 has 12 divisors (see below), whose sum is σ = 119934727164. Its totient is φ = 30459613184.

The previous prime is 64726678057. The next prime is 64726678109. The reversal of 64726678084 is 48087662746.

It can be written as a sum of positive squares in 2 ways, for example, as 56934732100 + 7791945984 = 238610^2 + 88272^2 .

It is a super-2 number, since 2×64726678084² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475931389 + ... + 475931524.

It is an arithmetic number, because the mean of its divisors is an integer number (9994560597).

Almost surely, 2^64726678084 is an apocalyptic number.

It is an amenable number.

64726678084 is a deficient number, since it is larger than the sum of its proper divisors (55208049080).

64726678084 is a wasteful number, since it uses less digits than its factorization.

64726678084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951862934 (or 951862932 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 58.

The spelling of 64726678084 in words is "sixty-four billion, seven hundred twenty-six million, six hundred seventy-eight thousand, eighty-four".