78872352157 has 2 divisors, whose sum is σ = 78872352158. Its totient is φ = 78872352156.

The previous prime is 78872352137. The next prime is 78872352199. The reversal of 78872352157 is 75125327887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74976844761 + 3895507396 = 273819^2 + 62414^2 .

It is a cyclic number.

It is not a de Polignac number, because 78872352157 - 2⁷ = 78872352029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78872352098 and 78872352107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78872352107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39436176078 + 39436176079.

It is an arithmetic number, because the mean of its divisors is an integer number (39436176079).

Almost surely, 2^78872352157 is an apocalyptic number.

It is an amenable number.

78872352157 is a deficient number, since it is larger than the sum of its proper divisors (1).

78872352157 is an equidigital number, since it uses as much as digits as its factorization.

78872352157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6585600, while the sum is 55.

The spelling of 78872352157 in words is "seventy-eight billion, eight hundred seventy-two million, three hundred fifty-two thousand, one hundred fifty-seven".