78197937147 has 24 divisors (see below), whose sum is σ = 123229798848. Its totient is φ = 47389302000.

The previous prime is 78197937127. The next prime is 78197937151. The reversal of 78197937147 is 74173979187.

78197937147 is a `hidden beast` number, since 78 + 197 + 9 + 371 + 4 + 7 = 666.

It is not a de Polignac number, because 78197937147 - 2¹⁰ = 78197936123 is a prime.

It is a super-2 number, since 2×78197937147² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78197937127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2519272 + ... + 2550122.

It is an arithmetic number, because the mean of its divisors is an integer number (5134574952).

Almost surely, 2^78197937147 is an apocalyptic number.

78197937147 is a deficient number, since it is larger than the sum of its proper divisors (45031861701).

78197937147 is a wasteful number, since it uses less digits than its factorization.

78197937147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56471 (or 56468 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 63.

The spelling of 78197937147 in words is "seventy-eight billion, one hundred ninety-seven million, nine hundred thirty-seven thousand, one hundred forty-seven".