78167442051 has 24 divisors (see below), whose sum is σ = 117832834080. Its totient is φ = 49839457536.

The previous prime is 78167442037. The next prime is 78167442151. The reversal of 78167442051 is 15024476187.

It is not a de Polignac number, because 78167442051 - 2²⁶ = 78100333187 is a prime.

It is a super-2 number, since 2×78167442051² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78167441988 and 78167442006.

It is not an unprimeable number, because it can be changed into a prime (78167442011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1973595 + ... + 2012811.

It is an arithmetic number, because the mean of its divisors is an integer number (4909701420).

Almost surely, 2^78167442051 is an apocalyptic number.

78167442051 is a deficient number, since it is larger than the sum of its proper divisors (39665392029).

78167442051 is a wasteful number, since it uses less digits than its factorization.

78167442051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48875 (or 48872 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 78167442051 in words is "seventy-eight billion, one hundred sixty-seven million, four hundred forty-two thousand, fifty-one".