715157857878 has 16 divisors (see below), whose sum is σ = 1430324241840. Its totient is φ = 238384531616.

The previous prime is 715157857877. The next prime is 715157857891. The reversal of 715157857878 is 878758751517.

715157857878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×715157857878² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715157857871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409608 + ... + 1848596.

It is an arithmetic number, because the mean of its divisors is an integer number (89395265115).

Almost surely, 2^715157857878 is an apocalyptic number.

715157857878 is an abundant number, since it is smaller than the sum of its proper divisors (715166383962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

715157857878 is a wasteful number, since it uses less digits than its factorization.

715157857878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710511.

The product of its digits is 153664000, while the sum is 69.

The spelling of 715157857878 in words is "seven hundred fifteen billion, one hundred fifty-seven million, eight hundred fifty-seven thousand, eight hundred seventy-eight".