6131257722157 has 2 divisors, whose sum is σ = 6131257722158. Its totient is φ = 6131257722156.

The previous prime is 6131257722119. The next prime is 6131257722181. The reversal of 6131257722157 is 7512277521316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5570704534756 + 560553187401 = 2360234^2 + 748701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6131257722157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6131257722157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6131257728157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065628861078 + 3065628861079.

It is an arithmetic number, because the mean of its divisors is an integer number (3065628861079).

Almost surely, 2^{6131257722157} is an apocalyptic number.

It is an amenable number.

6131257722157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131257722157 is an equidigital number, since it uses as much as digits as its factorization.

6131257722157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1234800, while the sum is 49.

The spelling of 6131257722157 in words is "six trillion, one hundred thirty-one billion, two hundred fifty-seven million, seven hundred twenty-two thousand, one hundred fifty-seven".