29915161481 has 2 divisors, whose sum is σ = 29915161482. Its totient is φ = 29915161480.

The previous prime is 29915161433. The next prime is 29915161489. The reversal of 29915161481 is 18416151992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24362527225 + 5552634256 = 156085^2 + 74516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29915161481 is a prime.

It is a super-2 number, since 2×29915161481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29915161489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14957580740 + 14957580741.

It is an arithmetic number, because the mean of its divisors is an integer number (14957580741).

Almost surely, 2^29915161481 is an apocalyptic number.

It is an amenable number.

29915161481 is a deficient number, since it is larger than the sum of its proper divisors (1).

29915161481 is an equidigital number, since it uses as much as digits as its factorization.

29915161481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 47.

The spelling of 29915161481 in words is "twenty-nine billion, nine hundred fifteen million, one hundred sixty-one thousand, four hundred eighty-one".