78504338667601 has 32 divisors (see below), whose sum is σ = 99687387340800. Its totient is φ = 60048758652480.

The previous prime is 78504338667589. The next prime is 78504338667611. The reversal of 78504338667601 is 10676683340587.

It is a cyclic number.

It is not a de Polignac number, because 78504338667601 - 2⁷ = 78504338667473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78504338667611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36246861 + ... + 38351578.

It is an arithmetic number, because the mean of its divisors is an integer number (3115230854400).

Almost surely, 2^{78504338667601} is an apocalyptic number.

It is an amenable number.

78504338667601 is a deficient number, since it is larger than the sum of its proper divisors (21183048673199).

78504338667601 is a wasteful number, since it uses less digits than its factorization.

78504338667601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74598709.

The product of its (nonzero) digits is 121927680, while the sum is 64.

The spelling of 78504338667601 in words is "seventy-eight trillion, five hundred four billion, three hundred thirty-eight million, six hundred sixty-seven thousand, six hundred one".