64073079133778 has 54 divisors (see below), whose sum is σ = 114395379256431. Its totient is φ = 26883130216800.

The previous prime is 64073079133769. The next prime is 64073079133781. The reversal of 64073079133778 is 87733197037046.

It can be written as a sum of positive squares in 5 ways, for example, as 19126741268569 + 44946337865209 = 4373413^2 + 6704203^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5660083.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1618763948 + ... + 1618803528.

Almost surely, 2^{64073079133778} is an apocalyptic number.

64073079133778 is a deficient number, since it is larger than the sum of its proper divisors (50322300122653).

64073079133778 is an frugal number, since it uses more digits than its factorization.

64073079133778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79212 (or 39607 counting only the distinct ones).

The product of its (nonzero) digits is 112021056, while the sum is 65.

The spelling of 64073079133778 in words is "sixty-four trillion, seventy-three billion, seventy-nine million, one hundred thirty-three thousand, seven hundred seventy-eight".