78322554491 has 8 divisors (see below), whose sum is σ = 79999363584. Its totient is φ = 76653116800.

The previous prime is 78322554481. The next prime is 78322554493. The reversal of 78322554491 is 19445522387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78322554491 - 2²⁶ = 78255445627 is a prime.

It is a super-2 number, since 2×78322554491² (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 (78322554493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821371 + ... + 1863876.

It is an arithmetic number, because the mean of its divisors is an integer number (9999920448).

Almost surely, 2^78322554491 is an apocalyptic number.

78322554491 is a deficient number, since it is larger than the sum of its proper divisors (1676809093).

78322554491 is a wasteful number, since it uses less digits than its factorization.

78322554491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685701.

The product of its digits is 2419200, while the sum is 50.

The spelling of 78322554491 in words is "seventy-eight billion, three hundred twenty-two million, five hundred fifty-four thousand, four hundred ninety-one".