78715748159 has 12 divisors (see below), whose sum is σ = 87254051664. Its totient is φ = 70864299264.

The previous prime is 78715748149. The next prime is 78715748179. The reversal of 78715748159 is 95184751787.

It is not a de Polignac number, because 78715748159 - 2¹⁶ = 78715682623 is a prime.

It is a super-2 number, since 2×78715748159² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78715748119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5914502 + ... + 5927795.

It is an arithmetic number, because the mean of its divisors is an integer number (7271170972).

Almost surely, 2^78715748159 is an apocalyptic number.

78715748159 is a deficient number, since it is larger than the sum of its proper divisors (8538303505).

78715748159 is a wasteful number, since it uses less digits than its factorization.

78715748159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11842354 (or 11842337 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 62.

The spelling of 78715748159 in words is "seventy-eight billion, seven hundred fifteen million, seven hundred forty-eight thousand, one hundred fifty-nine".