1616427172123 has 2 divisors, whose sum is σ = 1616427172124. Its totient is φ = 1616427172122.

The previous prime is 1616427172111. The next prime is 1616427172177. The reversal of 1616427172123 is 3212717246161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1616427172123 - 2²⁹ = 1615890301211 is a prime.

It is a super-2 number, since 2×1616427172123² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1616427172123.

It is not a weakly prime, because it can be changed into another prime (1616427172183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808213586061 + 808213586062.

It is an arithmetic number, because the mean of its divisors is an integer number (808213586062).

Almost surely, 2^{1616427172123} is an apocalyptic number.

1616427172123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616427172123 is an equidigital number, since it uses as much as digits as its factorization.

1616427172123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The spelling of 1616427172123 in words is "one trillion, six hundred sixteen billion, four hundred twenty-seven million, one hundred seventy-two thousand, one hundred twenty-three".