29105427297281 has 4 divisors (see below), whose sum is σ = 29253170583252. Its totient is φ = 28957684011312.

The previous prime is 29105427297257. The next prime is 29105427297301. The reversal of 29105427297281 is 18279272450192.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17548935831025 + 11556491466256 = 4189145^2 + 3399484^2 .

It is a cyclic number.

It is not a de Polignac number, because 29105427297281 - 2³⁰ = 29104353555457 is a prime.

It is a super-2 number, since 2×29105427297281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29105427297281.

It is not an unprimeable number, because it can be changed into a prime (29105427297251) 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, 73871642690 + ... + 73871643083.

It is an arithmetic number, because the mean of its divisors is an integer number (7313292645813).

Almost surely, 2^{29105427297281} is an apocalyptic number.

It is an amenable number.

29105427297281 is a deficient number, since it is larger than the sum of its proper divisors (147743285971).

29105427297281 is a wasteful number, since it uses less digits than its factorization.

29105427297281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147743285970.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 29105427297281 in words is "twenty-nine trillion, one hundred five billion, four hundred twenty-seven million, two hundred ninety-seven thousand, two hundred eighty-one".