78943121153 has 32 divisors (see below), whose sum is σ = 93314519424. Its totient is φ = 66106063872.

The previous prime is 78943121093. The next prime is 78943121171. The reversal of 78943121153 is 35112134987.

It is a cyclic number.

It is not a de Polignac number, because 78943121153 - 2²² = 78938926849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78943121183) 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, 829826 + ... + 920052.

It is an arithmetic number, because the mean of its divisors is an integer number (2916078732).

Almost surely, 2^78943121153 is an apocalyptic number.

It is an amenable number.

78943121153 is a deficient number, since it is larger than the sum of its proper divisors (14371398271).

78943121153 is a wasteful number, since it uses less digits than its factorization.

78943121153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90401.

The product of its digits is 181440, while the sum is 44.

The spelling of 78943121153 in words is "seventy-eight billion, nine hundred forty-three million, one hundred twenty-one thousand, one hundred fifty-three".