78077124961 has 48 divisors (see below), whose sum is σ = 92481100992. Its totient is φ = 65315289600.

The previous prime is 78077124947. The next prime is 78077125013. The reversal of 78077124961 is 16942177087.

It is not a de Polignac number, because 78077124961 - 2²⁵ = 78043570529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78077124899 and 78077124908.

It is not an unprimeable number, because it can be changed into a prime (78077124161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17414026 + ... + 17418508.

It is an arithmetic number, because the mean of its divisors is an integer number (1926689604).

Almost surely, 2^78077124961 is an apocalyptic number.

It is an amenable number.

78077124961 is a deficient number, since it is larger than the sum of its proper divisors (14403976031).

78077124961 is a wasteful number, since it uses less digits than its factorization.

78077124961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654 (or 4631 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 52.

The spelling of 78077124961 in words is "seventy-eight billion, seventy-seven million, one hundred twenty-four thousand, nine hundred sixty-one".