78905934323 has 4 divisors (see below), whose sum is σ = 81626828640. Its totient is φ = 76185040008.

The previous prime is 78905934319. The next prime is 78905934329. The reversal of 78905934323 is 32343950987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32343950987 = 7823 ⋅4134469.

It is a cyclic number.

It is not a de Polignac number, because 78905934323 - 2² = 78905934319 is a prime.

It is a super-2 number, since 2×78905934323² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78905934329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1360447115 + ... + 1360447172.

It is an arithmetic number, because the mean of its divisors is an integer number (20406707160).

Almost surely, 2^78905934323 is an apocalyptic number.

78905934323 is a deficient number, since it is larger than the sum of its proper divisors (2720894317).

78905934323 is a wasteful number, since it uses less digits than its factorization.

78905934323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720894316.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 78905934323 in words is "seventy-eight billion, nine hundred five million, nine hundred thirty-four thousand, three hundred twenty-three".