816431552941 has 4 divisors (see below), whose sum is σ = 816486810400. Its totient is φ = 816376295484.

The previous prime is 816431552933. The next prime is 816431553011. The reversal of 816431552941 is 149255134618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 149255134618 = 2 ⋅74627567309.

It is a cyclic number.

It is not a de Polignac number, because 816431552941 - 2³ = 816431552933 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 (816431552921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27606561 + ... + 27636118.

It is an arithmetic number, because the mean of its divisors is an integer number (204121702600).

Almost surely, 2^816431552941 is an apocalyptic number.

It is an amenable number.

816431552941 is a deficient number, since it is larger than the sum of its proper divisors (55257459).

816431552941 is a wasteful number, since it uses less digits than its factorization.

816431552941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55257458.

The product of its digits is 1036800, while the sum is 49.

The spelling of 816431552941 in words is "eight hundred sixteen billion, four hundred thirty-one million, five hundred fifty-two thousand, nine hundred forty-one".