11801028731 has 8 divisors (see below), whose sum is σ = 11843684160. Its totient is φ = 11758401288.

The previous prime is 11801028721. The next prime is 11801028803. The reversal of 11801028731 is 13782010811.

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 11801028731 - 2³⁰ = 10727286907 is a prime.

It is a super-3 number, since 3×11801028731³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11801028721) 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, 1206860 + ... + 1216598.

It is an arithmetic number, because the mean of its divisors is an integer number (1480460520).

Almost surely, 2^11801028731 is an apocalyptic number.

11801028731 is a deficient number, since it is larger than the sum of its proper divisors (42655429).

11801028731 is an equidigital number, since it uses as much as digits as its factorization.

11801028731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13993.

The product of its (nonzero) digits is 2688, while the sum is 32.

The spelling of 11801028731 in words is "eleven billion, eight hundred one million, twenty-eight thousand, seven hundred thirty-one".