78867193645 has 16 divisors (see below), whose sum is σ = 100322085168. Its totient is φ = 59314590720.

The previous prime is 78867193619. The next prime is 78867193661. The reversal of 78867193645 is 54639176887.

It can be written as a sum of positive squares in 8 ways, for example, as 612166564 + 78255027081 = 24742^2 + 279741^2 .

It is not a de Polignac number, because 78867193645 - 2²⁷ = 78732975917 is a prime.

It is a super-3 number, since 3×78867193645³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454446 + ... + 603535.

It is an arithmetic number, because the mean of its divisors is an integer number (6270130323).

Almost surely, 2^78867193645 is an apocalyptic number.

It is an amenable number.

78867193645 is a deficient number, since it is larger than the sum of its proper divisors (21454891523).

78867193645 is a wasteful number, since it uses less digits than its factorization.

78867193645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058880.

The product of its digits is 60963840, while the sum is 64.

The spelling of 78867193645 in words is "seventy-eight billion, eight hundred sixty-seven million, one hundred ninety-three thousand, six hundred forty-five".