77249162870197 has 2 divisors, whose sum is σ = 77249162870198. Its totient is φ = 77249162870196.

The previous prime is 77249162870171. The next prime is 77249162870219. The reversal of 77249162870197 is 79107826194277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72546341247396 + 4702821622801 = 8517414^2 + 2168599^2 .

It is a cyclic number.

It is not a de Polignac number, because 77249162870197 - 2³¹ = 77247015386549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77249162870137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38624581435098 + 38624581435099.

It is an arithmetic number, because the mean of its divisors is an integer number (38624581435099).

Almost surely, 2^{77249162870197} is an apocalyptic number.

It is an amenable number.

77249162870197 is a deficient number, since it is larger than the sum of its proper divisors (1).

77249162870197 is an equidigital number, since it uses as much as digits as its factorization.

77249162870197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 149361408, while the sum is 70.

The spelling of 77249162870197 in words is "seventy-seven trillion, two hundred forty-nine billion, one hundred sixty-two million, eight hundred seventy thousand, one hundred ninety-seven".