78733618955 has 4 divisors (see below), whose sum is σ = 94480342752. Its totient is φ = 62986895160.

The previous prime is 78733618937. The next prime is 78733618961. The reversal of 78733618955 is 55981633787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55981633787 = 149 ⋅375715663.

It is not a de Polignac number, because 78733618955 - 2¹⁶ = 78733553419 is a prime.

It is a super-2 number, since 2×78733618955² (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, 7873361891 + ... + 7873361900.

It is an arithmetic number, because the mean of its divisors is an integer number (23620085688).

Almost surely, 2^78733618955 is an apocalyptic number.

78733618955 is a deficient number, since it is larger than the sum of its proper divisors (15746723797).

78733618955 is a wasteful number, since it uses less digits than its factorization.

78733618955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15746723796.

The product of its digits is 38102400, while the sum is 62.

The spelling of 78733618955 in words is "seventy-eight billion, seven hundred thirty-three million, six hundred eighteen thousand, nine hundred fifty-five".