29129918818391 has 8 divisors (see below), whose sum is σ = 29197273983504. Its totient is φ = 29062596286080.

The previous prime is 29129918818387. The next prime is 29129918818411. The reversal of 29129918818391 is 19381881992192.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29129918818391 - 2² = 29129918818387 is a prime.

It is a super-2 number, since 2×29129918818391² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29129918818591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6370370 + ... + 9941903.

It is an arithmetic number, because the mean of its divisors is an integer number (3649659247938).

Almost surely, 2^{29129918818391} is an apocalyptic number.

29129918818391 is a deficient number, since it is larger than the sum of its proper divisors (67355165113).

29129918818391 is a wasteful number, since it uses less digits than its factorization.

29129918818391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16316401.

The product of its digits is 40310784, while the sum is 71.

The spelling of 29129918818391 in words is "twenty-nine trillion, one hundred twenty-nine billion, nine hundred eighteen million, eight hundred eighteen thousand, three hundred ninety-one".