123533709819 has 16 divisors (see below), whose sum is σ = 186717619200. Its totient is φ = 72019652256.

The previous prime is 123533709721. The next prime is 123533709841. The reversal of 123533709819 is 918907335321.

It is a de Polignac number, because none of the positive numbers 2^k-123533709819 is a prime.

It is a super-2 number, since 2×123533709819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123533709899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83355339 + ... + 83356820.

It is an arithmetic number, because the mean of its divisors is an integer number (11669851200).

Almost surely, 2^123533709819 is an apocalyptic number.

123533709819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123533709819 is a deficient number, since it is larger than the sum of its proper divisors (63183909381).

123533709819 is a wasteful number, since it uses less digits than its factorization.

123533709819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166712194.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The spelling of 123533709819 in words is "one hundred twenty-three billion, five hundred thirty-three million, seven hundred nine thousand, eight hundred nineteen".