64147605418 has 32 divisors (see below), whose sum is σ = 110417492304. Its totient is φ = 27687508992.

The previous prime is 64147605413. The next prime is 64147605419. The reversal of 64147605418 is 81450674146.

It can be written as a sum of positive squares in 8 ways, for example, as 6411685329 + 57735920089 = 80073^2 + 240283^2 .

It is a super-2 number, since 2×64147605418² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64147605413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392805 + ... + 531592.

Almost surely, 2^64147605418 is an apocalyptic number.

64147605418 is a deficient number, since it is larger than the sum of its proper divisors (46269886886).

64147605418 is a wasteful number, since it uses less digits than its factorization.

64147605418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924586.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 64147605418 in words is "sixty-four billion, one hundred forty-seven million, six hundred five thousand, four hundred eighteen".