77251313340181 has 2 divisors, whose sum is σ = 77251313340182. Its totient is φ = 77251313340180.

The previous prime is 77251313340067. The next prime is 77251313340211. The reversal of 77251313340181 is 18104331315277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59795345235025 + 17455968105156 = 7732745^2 + 4178034^2 .

It is a cyclic number.

It is not a de Polignac number, because 77251313340181 - 2⁷ = 77251313340053 is a prime.

It is a super-2 number, since 2×77251313340181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77251313343181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38625656670090 + 38625656670091.

It is an arithmetic number, because the mean of its divisors is an integer number (38625656670091).

Almost surely, 2^{77251313340181} is an apocalyptic number.

It is an amenable number.

77251313340181 is a deficient number, since it is larger than the sum of its proper divisors (1).

77251313340181 is an equidigital number, since it uses as much as digits as its factorization.

77251313340181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 77251313340181 in words is "seventy-seven trillion, two hundred fifty-one billion, three hundred thirteen million, three hundred forty thousand, one hundred eighty-one".