78265722318 has 64 divisors (see below), whose sum is σ = 179721262080. Its totient is φ = 22258282752.

The previous prime is 78265722299. The next prime is 78265722361. The reversal of 78265722318 is 81322756287.

It is a super-2 number, since 2×78265722318² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13876543 + ... + 13882181.

It is an arithmetic number, because the mean of its divisors is an integer number (2808144720).

Almost surely, 2^78265722318 is an apocalyptic number.

78265722318 is an abundant number, since it is smaller than the sum of its proper divisors (101455539762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78265722318 is a wasteful number, since it uses less digits than its factorization.

78265722318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7121.

The product of its digits is 2257920, while the sum is 51.

The spelling of 78265722318 in words is "seventy-eight billion, two hundred sixty-five million, seven hundred twenty-two thousand, three hundred eighteen".