78115622801 has 4 divisors (see below), whose sum is σ = 78228670704. Its totient is φ = 78002574900.

The previous prime is 78115622777. The next prime is 78115622839. The reversal of 78115622801 is 10822651187.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10822651187 = 100501 ⋅107687.

It is a cyclic number.

It is not a de Polignac number, because 78115622801 - 2⁶ = 78115622737 is a prime.

It is a super-2 number, since 2×78115622801² (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 (78115622401) 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, 56522915 + ... + 56524296.

It is an arithmetic number, because the mean of its divisors is an integer number (19557167676).

Almost surely, 2^78115622801 is an apocalyptic number.

It is an amenable number.

78115622801 is a deficient number, since it is larger than the sum of its proper divisors (113047903).

78115622801 is a wasteful number, since it uses less digits than its factorization.

78115622801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113047902.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 78115622801 in words is "seventy-eight billion, one hundred fifteen million, six hundred twenty-two thousand, eight hundred one".