77977019165 has 16 divisors (see below), whose sum is σ = 96975760896. Its totient is φ = 60128760000.

The previous prime is 77977019161. The next prime is 77977019171. The reversal of 77977019165 is 56191077977.

It is not a de Polignac number, because 77977019165 - 2² = 77977019161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77977019161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 963242 + ... + 1041051.

It is an arithmetic number, because the mean of its divisors is an integer number (6060985056).

Almost surely, 2^77977019165 is an apocalyptic number.

It is an amenable number.

77977019165 is a deficient number, since it is larger than the sum of its proper divisors (18998741731).

77977019165 is a wasteful number, since it uses less digits than its factorization.

77977019165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004580.

The product of its (nonzero) digits is 5834430, while the sum is 59.

The spelling of 77977019165 in words is "seventy-seven billion, nine hundred seventy-seven million, nineteen thousand, one hundred sixty-five".