78704036520401 has 16 divisors (see below), whose sum is σ = 82733865998784. Its totient is φ = 74775334866624.

The previous prime is 78704036520379. The next prime is 78704036520407. The reversal of 78704036520401 is 10402563040787.

It is a de Polignac number, because none of the positive numbers 2^k-78704036520401 is a prime.

It is a super-2 number, since 2×78704036520401² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78704036520407) 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, 1097591 + ... + 12594156.

It is an arithmetic number, because the mean of its divisors is an integer number (5170866624924).

Almost surely, 2^{78704036520401} is an apocalyptic number.

It is an amenable number.

78704036520401 is a deficient number, since it is larger than the sum of its proper divisors (4029829478383).

78704036520401 is a wasteful number, since it uses less digits than its factorization.

78704036520401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13695440.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 78704036520401 in words is "seventy-eight trillion, seven hundred four billion, thirty-six million, five hundred twenty thousand, four hundred one".