29142693138081 has 4 divisors (see below), whose sum is σ = 38856924184112. Its totient is φ = 19428462092052.

The previous prime is 29142693138079. The next prime is 29142693138121. The reversal of 29142693138081 is 18083139624192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 29142693138081 - 2¹ = 29142693138079 is a prime.

It is a super-2 number, since 2×29142693138081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29142693138011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4857115523011 + ... + 4857115523016.

It is an arithmetic number, because the mean of its divisors is an integer number (9714231046028).

Almost surely, 2^{29142693138081} is an apocalyptic number.

It is an amenable number.

29142693138081 is a deficient number, since it is larger than the sum of its proper divisors (9714231046031).

29142693138081 is an equidigital number, since it uses as much as digits as its factorization.

29142693138081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9714231046030.

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 29142693138081 in words is "twenty-nine trillion, one hundred forty-two billion, six hundred ninety-three million, one hundred thirty-eight thousand, eighty-one".