77967315901 has 2 divisors, whose sum is σ = 77967315902. Its totient is φ = 77967315900.

The previous prime is 77967315851. The next prime is 77967315913. The reversal of 77967315901 is 10951376977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72548883801 + 5418432100 = 269349^2 + 73610^2 .

It is a cyclic number.

It is not a de Polignac number, because 77967315901 - 2⁹ = 77967315389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77967315931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38983657950 + 38983657951.

It is an arithmetic number, because the mean of its divisors is an integer number (38983657951).

Almost surely, 2^77967315901 is an apocalyptic number.

It is an amenable number.

77967315901 is a deficient number, since it is larger than the sum of its proper divisors (1).

77967315901 is an equidigital number, since it uses as much as digits as its factorization.

77967315901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2500470, while the sum is 55.

The spelling of 77967315901 in words is "seventy-seven billion, nine hundred sixty-seven million, three hundred fifteen thousand, nine hundred one".