80999481129157 has 2 divisors, whose sum is σ = 80999481129158. Its totient is φ = 80999481129156.

The previous prime is 80999481129089. The next prime is 80999481129187. The reversal of 80999481129157 is 75192118499908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80961106669921 + 38374459236 = 8997839^2 + 195894^2 .

It is a cyclic number.

It is not a de Polignac number, because 80999481129157 - 2³¹ = 80997333645509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80999481129157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80999481129187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40499740564578 + 40499740564579.

It is an arithmetic number, because the mean of its divisors is an integer number (40499740564579).

Almost surely, 2^{80999481129157} is an apocalyptic number.

It is an amenable number.

80999481129157 is a deficient number, since it is larger than the sum of its proper divisors (1).

80999481129157 is an equidigital number, since it uses as much as digits as its factorization.

80999481129157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117573120, while the sum is 73.

The spelling of 80999481129157 in words is "eighty trillion, nine hundred ninety-nine billion, four hundred eighty-one million, one hundred twenty-nine thousand, one hundred fifty-seven".