161446666125 has 64 divisors (see below), whose sum is σ = 269829331200. Its totient is φ = 85727001600.

The previous prime is 161446666123. The next prime is 161446666127. The reversal of 161446666125 is 521666644161.

It is an interprime number because it is at equal distance from previous prime (161446666123) and next prime (161446666127).

It is not a de Polignac number, because 161446666125 - 2¹ = 161446666123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161446666123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156288609 + ... + 156289641.

It is an arithmetic number, because the mean of its divisors is an integer number (4216083300).

Almost surely, 2^161446666125 is an apocalyptic number.

161446666125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161446666125 is a deficient number, since it is larger than the sum of its proper divisors (108382665075).

161446666125 is a wasteful number, since it uses less digits than its factorization.

161446666125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2469 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The spelling of 161446666125 in words is "one hundred sixty-one billion, four hundred forty-six million, six hundred sixty-six thousand, one hundred twenty-five".