77157987730933 has 2 divisors, whose sum is σ = 77157987730934. Its totient is φ = 77157987730932.

The previous prime is 77157987730919. The next prime is 77157987730963. The reversal of 77157987730933 is 33903778975177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76824558861444 + 333428869489 = 8764962^2 + 577433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77157987730933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77157987730933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77157987730903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38578993865466 + 38578993865467.

It is an arithmetic number, because the mean of its divisors is an integer number (38578993865467).

Almost surely, 2^{77157987730933} is an apocalyptic number.

It is an amenable number.

77157987730933 is a deficient number, since it is larger than the sum of its proper divisors (1).

77157987730933 is an equidigital number, since it uses as much as digits as its factorization.

77157987730933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470276360, while the sum is 76.

The spelling of 77157987730933 in words is "seventy-seven trillion, one hundred fifty-seven billion, nine hundred eighty-seven million, seven hundred thirty thousand, nine hundred thirty-three".