29372071681 has 4 divisors (see below), whose sum is σ = 29566588864. Its totient is φ = 29177554500.

The previous prime is 29372071669. The next prime is 29372071693. The reversal of 29372071681 is 18617027392.

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 an interprime number because it is at equal distance from previous prime (29372071669) and next prime (29372071693).

It is a cyclic number.

It is not a de Polignac number, because 29372071681 - 2⁵ = 29372071649 is a prime.

It is a super-2 number, since 2×29372071681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29382071681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97258365 + ... + 97258666.

It is an arithmetic number, because the mean of its divisors is an integer number (7391647216).

Almost surely, 2^29372071681 is an apocalyptic number.

It is an amenable number.

29372071681 is a deficient number, since it is larger than the sum of its proper divisors (194517183).

29372071681 is a wasteful number, since it uses less digits than its factorization.

29372071681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194517182.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 29372071681 in words is "twenty-nine billion, three hundred seventy-two million, seventy-one thousand, six hundred eighty-one".