29191921085 has 8 divisors (see below), whose sum is σ = 35047946976. Its totient is φ = 23341775760.

The previous prime is 29191921019. The next prime is 29191921123. The reversal of 29191921085 is 58012919192.

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

It is not a de Polignac number, because 29191921085 - 2²² = 29187726781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459211 + ... + 1479080.

It is an arithmetic number, because the mean of its divisors is an integer number (4380993372).

Almost surely, 2^29191921085 is an apocalyptic number.

It is an amenable number.

29191921085 is a deficient number, since it is larger than the sum of its proper divisors (5856025891).

29191921085 is a wasteful number, since it uses less digits than its factorization.

29191921085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940283.

The product of its (nonzero) digits is 116640, while the sum is 47.

The spelling of 29191921085 in words is "twenty-nine billion, one hundred ninety-one million, nine hundred twenty-one thousand, eighty-five".