9991892801 has 8 divisors (see below), whose sum is σ = 10902354624. Its totient is φ = 9081782320.

The previous prime is 9991892777. The next prime is 9991892803. The reversal of 9991892801 is 1082981999.

9991892801 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9991892801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991892803) 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, 26501 + ... + 143826.

It is an arithmetic number, because the mean of its divisors is an integer number (1362794328).

Almost surely, 2^9991892801 is an apocalyptic number.

It is an amenable number.

9991892801 is a deficient number, since it is larger than the sum of its proper divisors (910461823).

9991892801 is a wasteful number, since it uses less digits than its factorization.

9991892801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175671.

The product of its (nonzero) digits is 839808, while the sum is 56.

The square root of 9991892801 is about 99959.4557858335. The cubic root of 9991892801 is about 2153.8523182646.

The spelling of 9991892801 in words is "nine billion, nine hundred ninety-one million, eight hundred ninety-two thousand, eight hundred one".