161012123999 has 8 divisors (see below), whose sum is σ = 165374742048. Its totient is φ = 156650081760.

The previous prime is 161012123981. The next prime is 161012124019. The reversal of 161012123999 is 999321210161.

161012123999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161012123999 - 2²⁴ = 160995346783 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 (161012123939) 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 7 ways as a sum of consecutive naturals, for example, 456329 + ... + 728189.

It is an arithmetic number, because the mean of its divisors is an integer number (20671842756).

Almost surely, 2^161012123999 is an apocalyptic number.

161012123999 is a deficient number, since it is larger than the sum of its proper divisors (4362618049).

161012123999 is a wasteful number, since it uses less digits than its factorization.

161012123999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287905.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 161012123999 in words is "one hundred sixty-one billion, twelve million, one hundred twenty-three thousand, nine hundred ninety-nine".