77118022081 has 8 divisors (see below), whose sum is σ = 77557888800. Its totient is φ = 76678256160.

The previous prime is 77118022067. The next prime is 77118022099. The reversal of 77118022081 is 18022081177.

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 77118022081 - 2²⁷ = 76983804353 is a prime.

It is a super-2 number, since 2×77118022081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77118022081.

It is not an unprimeable number, because it can be changed into a prime (77118029081) 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, 1945621 + ... + 1984861.

It is an arithmetic number, because the mean of its divisors is an integer number (9694736100).

Almost surely, 2^77118022081 is an apocalyptic number.

It is an amenable number.

77118022081 is a deficient number, since it is larger than the sum of its proper divisors (439866719).

77118022081 is a wasteful number, since it uses less digits than its factorization.

77118022081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50399.

The product of its (nonzero) digits is 12544, while the sum is 37.

The spelling of 77118022081 in words is "seventy-seven billion, one hundred eighteen million, twenty-two thousand, eighty-one".