78197825307 has 16 divisors (see below), whose sum is σ = 120937079552. Its totient is φ = 44017538400.

The previous prime is 78197825287. The next prime is 78197825333. The reversal of 78197825307 is 70352879187.

It is not a de Polignac number, because 78197825307 - 2¹⁸ = 78197563163 is a prime.

It is a super-2 number, since 2×78197825307² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78197825347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27787444 + ... + 27790257.

It is an arithmetic number, because the mean of its divisors is an integer number (7558567472).

Almost surely, 2^78197825307 is an apocalyptic number.

78197825307 is a deficient number, since it is larger than the sum of its proper divisors (42739254245).

78197825307 is a wasteful number, since it uses less digits than its factorization.

78197825307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55577778.

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 78197825307 in words is "seventy-eight billion, one hundred ninety-seven million, eight hundred twenty-five thousand, three hundred seven".