511727391157 has 2 divisors, whose sum is σ = 511727391158. Its totient is φ = 511727391156.

The previous prime is 511727391143. The next prime is 511727391173. The reversal of 511727391157 is 751193727115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451215819076 + 60511572081 = 671726^2 + 245991^2 .

It is a cyclic number.

It is not a de Polignac number, because 511727391157 - 2¹¹ = 511727389109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 511727391157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511727391137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255863695578 + 255863695579.

It is an arithmetic number, because the mean of its divisors is an integer number (255863695579).

Almost surely, 2^511727391157 is an apocalyptic number.

It is an amenable number.

511727391157 is a deficient number, since it is larger than the sum of its proper divisors (1).

511727391157 is an equidigital number, since it uses as much as digits as its factorization.

511727391157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 463050, while the sum is 49.

The spelling of 511727391157 in words is "five hundred eleven billion, seven hundred twenty-seven million, three hundred ninety-one thousand, one hundred fifty-seven".