64380365312040 has 80 divisors (see below), whose sum is σ = 216389561198580. Its totient is φ = 17168097415680.

The previous prime is 64380365311993. The next prime is 64380365312117. The reversal of 64380365312040 is 4021356308346.

64380365312040 is a `hidden beast` number, since 6 + 4 + 3 + 80 + 36 + 531 + 2 + 0 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 60143840520516 + 4236524791524 = 7755246^2 + 2058282^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9935238321 + ... + 9935244800.

Almost surely, 2^{64380365312040} is an apocalyptic number.

64380365312040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64380365312040 is an abundant number, since it is smaller than the sum of its proper divisors (152009195886540).

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

64380365312040 is a wasteful number, since it uses less digits than its factorization.

64380365312040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19870483144 (or 19870483131 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 64380365312040 in words is "sixty-four trillion, three hundred eighty billion, three hundred sixty-five million, three hundred twelve thousand, forty".