64423686160 has 40 divisors (see below), whose sum is σ = 149873650776. Its totient is φ = 25754234880.

The previous prime is 64423686083. The next prime is 64423686193. The reversal of 64423686160 is 6168632446.

It can be written as a sum of positive squares in 4 ways, for example, as 5834515456 + 58589170704 = 76384^2 + 242052^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×64423686160² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64423686160.

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, 101511 + ... + 373030.

Almost surely, 2^64423686160 is an apocalyptic number.

It is an amenable number.

64423686160 is an abundant number, since it is smaller than the sum of its proper divisors (85449964616).

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

64423686160 is a wasteful number, since it uses less digits than its factorization.

64423686160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476251 (or 476245 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 64423686160 in words is "sixty-four billion, four hundred twenty-three million, six hundred eighty-six thousand, one hundred sixty".