83775778723641 has 4 divisors (see below), whose sum is σ = 111701038298192. Its totient is φ = 55850519149092.

The previous prime is 83775778723603. The next prime is 83775778723711. The reversal of 83775778723641 is 14632787757738.

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.

It is not a de Polignac number, because 83775778723641 - 2³³ = 83767188789049 is a prime.

It is a super-2 number, since 2×83775778723641² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83775778723141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13962629787271 + ... + 13962629787276.

It is an arithmetic number, because the mean of its divisors is an integer number (27925259574548).

Almost surely, 2^{83775778723641} is an apocalyptic number.

It is an amenable number.

83775778723641 is a deficient number, since it is larger than the sum of its proper divisors (27925259574551).

83775778723641 is a wasteful number, since it uses less digits than its factorization.

83775778723641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27925259574550.

The product of its digits is 2323399680, while the sum is 75.

The spelling of 83775778723641 in words is "eighty-three trillion, seven hundred seventy-five billion, seven hundred seventy-eight million, seven hundred twenty-three thousand, six hundred forty-one".