123820366051599 has 48 divisors (see below), whose sum is σ = 195455205325440. Its totient is φ = 69501046923840.

The previous prime is 123820366051541. The next prime is 123820366051631. The reversal of 123820366051599 is 995150663028321.

It is a happy number.

It is a Cunningham number, because it is equal to 11127460²-1.

It is not a de Polignac number, because 123820366051599 - 2⁷ = 123820366051471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123820366051099) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5563729 + ... + 16691189.

It is an arithmetic number, because the mean of its divisors is an integer number (4071983444280).

Almost surely, 2^{123820366051599} is an apocalyptic number.

123820366051599 is a deficient number, since it is larger than the sum of its proper divisors (71634839273841).

123820366051599 is a wasteful number, since it uses less digits than its factorization.

123820366051599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11128820 (or 11128813 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 60.

The spelling of 123820366051599 in words is "one hundred twenty-three trillion, eight hundred twenty billion, three hundred sixty-six million, fifty-one thousand, five hundred ninety-nine".