515661161107 has 2 divisors, whose sum is σ = 515661161108. Its totient is φ = 515661161106.

The previous prime is 515661161089. The next prime is 515661161219. The reversal of 515661161107 is 701161166515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515661161107 - 2²³ = 515652772499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 515661161107.

It is not a weakly prime, because it can be changed into another prime (515662161107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257830580553 + 257830580554.

It is an arithmetic number, because the mean of its divisors is an integer number (257830580554).

Almost surely, 2^515661161107 is an apocalyptic number.

515661161107 is a deficient number, since it is larger than the sum of its proper divisors (1).

515661161107 is an equidigital number, since it uses as much as digits as its factorization.

515661161107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 40.

The spelling of 515661161107 in words is "five hundred fifteen billion, six hundred sixty-one million, one hundred sixty-one thousand, one hundred seven".