78918372797 has 24 divisors (see below), whose sum is σ = 87185138880. Its totient is φ = 71380900800.

The previous prime is 78918372781. The next prime is 78918372803. The reversal of 78918372797 is 79727381987.

It is not a de Polignac number, because 78918372797 - 2⁴ = 78918372781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78918372997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22787288 + ... + 22790750.

It is an arithmetic number, because the mean of its divisors is an integer number (3632714120).

Almost surely, 2^78918372797 is an apocalyptic number.

It is an amenable number.

78918372797 is a deficient number, since it is larger than the sum of its proper divisors (8266766083).

78918372797 is a wasteful number, since it uses less digits than its factorization.

78918372797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385 (or 4374 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 68.

The spelling of 78918372797 in words is "seventy-eight billion, nine hundred eighteen million, three hundred seventy-two thousand, seven hundred ninety-seven".