29131692145081 has 2 divisors, whose sum is σ = 29131692145082. Its totient is φ = 29131692145080.

The previous prime is 29131692145043. The next prime is 29131692145123. The reversal of 29131692145081 is 18054129613192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24327336675625 + 4804355469456 = 4932275^2 + 2191884^2 .

It is a cyclic number.

It is not a de Polignac number, because 29131692145081 - 2¹¹ = 29131692143033 is a prime.

It is a super-2 number, since 2×29131692145081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29131692145001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14565846072540 + 14565846072541.

It is an arithmetic number, because the mean of its divisors is an integer number (14565846072541).

Almost surely, 2^{29131692145081} is an apocalyptic number.

It is an amenable number.

29131692145081 is a deficient number, since it is larger than the sum of its proper divisors (1).

29131692145081 is an equidigital number, since it uses as much as digits as its factorization.

29131692145081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 29131692145081 in words is "twenty-nine trillion, one hundred thirty-one billion, six hundred ninety-two million, one hundred forty-five thousand, eighty-one".