78715715153 has 2 divisors, whose sum is σ = 78715715154. Its totient is φ = 78715715152.

The previous prime is 78715715149. The next prime is 78715715159. The reversal of 78715715153 is 35151751787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62288678929 + 16427036224 = 249577^2 + 128168^2 .

It is a cyclic number.

It is not a de Polignac number, because 78715715153 - 2² = 78715715149 is a prime.

It is not a weakly prime, because it can be changed into another prime (78715715159) 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 as a sum of consecutive naturals, namely, 39357857576 + 39357857577.

It is an arithmetic number, because the mean of its divisors is an integer number (39357857577).

Almost surely, 2^78715715153 is an apocalyptic number.

It is an amenable number.

78715715153 is a deficient number, since it is larger than the sum of its proper divisors (1).

78715715153 is an equidigital number, since it uses as much as digits as its factorization.

78715715153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1029000, while the sum is 50.

The spelling of 78715715153 in words is "seventy-eight billion, seven hundred fifteen million, seven hundred fifteen thousand, one hundred fifty-three".