161723156325 has 48 divisors (see below), whose sum is σ = 268338033600. Its totient is φ = 85944499200.

The previous prime is 161723156303. The next prime is 161723156347. The reversal of 161723156325 is 523651327161.

It is an interprime number because it is at equal distance from previous prime (161723156303) and next prime (161723156347).

It is not a de Polignac number, because 161723156325 - 2⁸ = 161723156069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42322915 + ... + 42326735.

It is an arithmetic number, because the mean of its divisors is an integer number (5590375700).

Almost surely, 2^161723156325 is an apocalyptic number.

161723156325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161723156325 is a deficient number, since it is larger than the sum of its proper divisors (106614877275).

161723156325 is a wasteful number, since it uses less digits than its factorization.

161723156325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702 (or 5697 counting only the distinct ones).

The product of its digits is 226800, while the sum is 42.

The spelling of 161723156325 in words is "one hundred sixty-one billion, seven hundred twenty-three million, one hundred fifty-six thousand, three hundred twenty-five".