29915161517 has 2 divisors, whose sum is σ = 29915161518. Its totient is φ = 29915161516.

The previous prime is 29915161501. The next prime is 29915161571. The reversal of 29915161517 is 71516151992.

Together with next prime (29915161571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29326905001 + 588256516 = 171251^2 + 24254^2 .

It is a cyclic number.

It is not a de Polignac number, because 29915161517 - 2⁴ = 29915161501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29915166517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14957580758 + 14957580759.

It is an arithmetic number, because the mean of its divisors is an integer number (14957580759).

Almost surely, 2^29915161517 is an apocalyptic number.

It is an amenable number.

29915161517 is a deficient number, since it is larger than the sum of its proper divisors (1).

29915161517 is an equidigital number, since it uses as much as digits as its factorization.

29915161517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 47.

The spelling of 29915161517 in words is "twenty-nine billion, nine hundred fifteen million, one hundred sixty-one thousand, five hundred seventeen".