64077667904 has 28 divisors (see below), whose sum is σ = 128279394444. Its totient is φ = 31755300864.

The previous prime is 64077667891. The next prime is 64077667919. The reversal of 64077667904 is 40976677046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34986954304 + 29090713600 = 187048^2 + 170560^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64077667904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4422917 + ... + 4437380.

Almost surely, 2^64077667904 is an apocalyptic number.

64077667904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64077667904 is an abundant number, since it is smaller than the sum of its proper divisors (64201726540).

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

64077667904 is a wasteful number, since it uses less digits than its factorization.

64077667904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860422 (or 8860412 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 56.

The spelling of 64077667904 in words is "sixty-four billion, seventy-seven million, six hundred sixty-seven thousand, nine hundred four".