77178613161 has 8 divisors (see below), whose sum is σ = 110820572800. Its totient is φ = 47494531152.

The previous prime is 77178613153. The next prime is 77178613177. The reversal of 77178613161 is 16131687177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77178613161 - 2³ = 77178613153 is a prime.

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 77178613161.

It is not an unprimeable number, because it can be changed into a prime (77178613121) 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, 989469361 + ... + 989469438.

It is an arithmetic number, because the mean of its divisors is an integer number (13852571600).

Almost surely, 2^77178613161 is an apocalyptic number.

It is an amenable number.

77178613161 is a deficient number, since it is larger than the sum of its proper divisors (33641959639).

77178613161 is a wasteful number, since it uses less digits than its factorization.

77178613161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978938815.

The product of its digits is 296352, while the sum is 48.

The spelling of 77178613161 in words is "seventy-seven billion, one hundred seventy-eight million, six hundred thirteen thousand, one hundred sixty-one".