78163288955 has 4 divisors (see below), whose sum is σ = 93795946752. Its totient is φ = 62530631160.

The previous prime is 78163288943. The next prime is 78163288967. The reversal of 78163288955 is 55988236187.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78163288943) and next prime (78163288967).

It is a de Polignac number, because none of the positive numbers 2^k-78163288955 is a prime.

It is a super-2 number, since 2×78163288955² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7816328891 + ... + 7816328900.

It is an arithmetic number, because the mean of its divisors is an integer number (23448986688).

Almost surely, 2^78163288955 is an apocalyptic number.

78163288955 is a deficient number, since it is larger than the sum of its proper divisors (15632657797).

78163288955 is a wasteful number, since it uses less digits than its factorization.

78163288955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15632657796.

The product of its digits is 29030400, while the sum is 62.

The spelling of 78163288955 in words is "seventy-eight billion, one hundred sixty-three million, two hundred eighty-eight thousand, nine hundred fifty-five".