829901941921 has 16 divisors (see below), whose sum is σ = 941653230336. Its totient is φ = 725642064576.

The previous prime is 829901941919. The next prime is 829901941951. The reversal of 829901941921 is 129149109928.

It is not a de Polignac number, because 829901941921 - 2¹ = 829901941919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (829901941951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13442950 + ... + 13504543.

It is an arithmetic number, because the mean of its divisors is an integer number (58853326896).

Almost surely, 2^829901941921 is an apocalyptic number.

It is an amenable number.

829901941921 is a deficient number, since it is larger than the sum of its proper divisors (111751288415).

829901941921 is a wasteful number, since it uses less digits than its factorization.

829901941921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26947632.

The product of its (nonzero) digits is 839808, while the sum is 55.

The spelling of 829901941921 in words is "eight hundred twenty-nine billion, nine hundred one million, nine hundred forty-one thousand, nine hundred twenty-one".