811235640096001 has 4 divisors (see below), whose sum is σ = 811530313415172. Its totient is φ = 810940966776832.

The previous prime is 811235640095929. The next prime is 811235640096097. The reversal of 811235640096001 is 100690046532118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 775987433615601 + 35248206480400 = 27856551^2 + 5937020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811235640096001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811235640096701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147336655456 + ... + 147336660961.

It is an arithmetic number, because the mean of its divisors is an integer number (202882578353793).

Almost surely, 2^{811235640096001} is an apocalyptic number.

It is an amenable number.

811235640096001 is a deficient number, since it is larger than the sum of its proper divisors (294673319171).

811235640096001 is a wasteful number, since it uses less digits than its factorization.

811235640096001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294673319170.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 811235640096001 in words is "eight hundred eleven trillion, two hundred thirty-five billion, six hundred forty million, ninety-six thousand, one".