811101557009 has 8 divisors (see below), whose sum is σ = 828488978592. Its totient is φ = 793883769120.

The previous prime is 811101556997. The next prime is 811101557033. The reversal of 811101557009 is 900755101118.

811101557009 is digitally balanced in base 2, 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-811101557009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (811101557089) 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, 42398759 + ... + 42417884.

It is an arithmetic number, because the mean of its divisors is an integer number (103561122324).

Almost surely, 2^811101557009 is an apocalyptic number.

It is an amenable number.

811101557009 is a deficient number, since it is larger than the sum of its proper divisors (17387421583).

811101557009 is a wasteful number, since it uses less digits than its factorization.

811101557009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84816847.

The product of its (nonzero) digits is 12600, while the sum is 38.

The spelling of 811101557009 in words is "eight hundred eleven billion, one hundred one million, five hundred fifty-seven thousand, nine".