123908099557 has 8 divisors (see below), whose sum is σ = 135195652800. Its totient is φ = 112624409760.

The previous prime is 123908099519. The next prime is 123908099561. The reversal of 123908099557 is 755990809321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123908099557 - 2¹⁹ = 123907575269 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 (123908099507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 898593 + ... + 1027270.

It is an arithmetic number, because the mean of its divisors is an integer number (16899456600).

Almost surely, 2^123908099557 is an apocalyptic number.

It is an amenable number.

123908099557 is a deficient number, since it is larger than the sum of its proper divisors (11287553243).

123908099557 is a wasteful number, since it uses less digits than its factorization.

123908099557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931723.

The product of its (nonzero) digits is 6123600, while the sum is 58.

The spelling of 123908099557 in words is "one hundred twenty-three billion, nine hundred eight million, ninety-nine thousand, five hundred fifty-seven".