78142919151 has 32 divisors (see below), whose sum is σ = 124498425600. Its totient is φ = 43036474880.

The previous prime is 78142919143. The next prime is 78142919171. The reversal of 78142919151 is 15191924187.

It is a cyclic number.

It is not a de Polignac number, because 78142919151 - 2³ = 78142919143 is a prime.

It is a super-2 number, since 2×78142919151² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78142919151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78142919171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2385321 + ... + 2417858.

It is an arithmetic number, because the mean of its divisors is an integer number (3890575800).

Almost surely, 2^78142919151 is an apocalyptic number.

78142919151 is a deficient number, since it is larger than the sum of its proper divisors (46355506449).

78142919151 is a wasteful number, since it uses less digits than its factorization.

78142919151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803239.

The product of its digits is 181440, while the sum is 48.

The spelling of 78142919151 in words is "seventy-eight billion, one hundred forty-two million, nine hundred nineteen thousand, one hundred fifty-one".