78180158077 has 16 divisors (see below), whose sum is σ = 91959570432. Its totient is φ = 65081625840.

The previous prime is 78180158033. The next prime is 78180158087. The reversal of 78180158077 is 77085108187.

It is not a de Polignac number, because 78180158077 - 2²³ = 78171769469 is a prime.

It is a super-2 number, since 2×78180158077² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78180158087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140613 + ... + 1207210.

It is an arithmetic number, because the mean of its divisors is an integer number (5747473152).

Almost surely, 2^78180158077 is an apocalyptic number.

It is an amenable number.

78180158077 is a deficient number, since it is larger than the sum of its proper divisors (13779412355).

78180158077 is a wasteful number, since it uses less digits than its factorization.

78180158077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347968.

The product of its (nonzero) digits is 878080, while the sum is 52.

The spelling of 78180158077 in words is "seventy-eight billion, one hundred eighty million, one hundred fifty-eight thousand, seventy-seven".