78780580065407 has 16 divisors (see below), whose sum is σ = 88008708332160. Its totient is φ = 69899388468000.

The previous prime is 78780580065361. The next prime is 78780580065413. The reversal of 78780580065407 is 70456008508787.

It is a cyclic number.

It is not a de Polignac number, because 78780580065407 - 2⁸ = 78780580065151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78780580065907) 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, 63395057 + ... + 64625802.

It is an arithmetic number, because the mean of its divisors is an integer number (5500544270760).

Almost surely, 2^{78780580065407} is an apocalyptic number.

78780580065407 is a deficient number, since it is larger than the sum of its proper divisors (9228128266753).

78780580065407 is a wasteful number, since it uses less digits than its factorization.

78780580065407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128022214.

The product of its (nonzero) digits is 105369600, while the sum is 65.

The spelling of 78780580065407 in words is "seventy-eight trillion, seven hundred eighty billion, five hundred eighty million, sixty-five thousand, four hundred seven".