515157872129 has 2 divisors, whose sum is σ = 515157872130. Its totient is φ = 515157872128.

The previous prime is 515157872111. The next prime is 515157872167. The reversal of 515157872129 is 921278751515.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349455957904 + 165701914225 = 591148^2 + 407065^2 .

It is a cyclic number.

It is not a de Polignac number, because 515157872129 - 2²⁸ = 514889436673 is a prime.

It is a super-2 number, since 2×515157872129² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (515157874129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257578936064 + 257578936065.

It is an arithmetic number, because the mean of its divisors is an integer number (257578936065).

Almost surely, 2^515157872129 is an apocalyptic number.

It is an amenable number.

515157872129 is a deficient number, since it is larger than the sum of its proper divisors (1).

515157872129 is an equidigital number, since it uses as much as digits as its factorization.

515157872129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764000, while the sum is 53.

The spelling of 515157872129 in words is "five hundred fifteen billion, one hundred fifty-seven million, eight hundred seventy-two thousand, one hundred twenty-nine".