811497238351 has 4 divisors (see below), whose sum is σ = 811523318272. Its totient is φ = 811471158432.

The previous prime is 811497238313. The next prime is 811497238393. The reversal of 811497238351 is 153832794118.

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

It is a cyclic number.

It is not a de Polignac number, because 811497238351 - 2⁹ = 811497237839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811497238151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12993231 + ... + 13055536.

It is an arithmetic number, because the mean of its divisors is an integer number (202880829568).

Almost surely, 2^811497238351 is an apocalyptic number.

811497238351 is a deficient number, since it is larger than the sum of its proper divisors (26079921).

811497238351 is a wasteful number, since it uses less digits than its factorization.

811497238351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26079920.

The product of its digits is 1451520, while the sum is 52.

The spelling of 811497238351 in words is "eight hundred eleven billion, four hundred ninety-seven million, two hundred thirty-eight thousand, three hundred fifty-one".