161500151565 has 32 divisors (see below), whose sum is σ = 287142950400. Its totient is φ = 86123943360.

The previous prime is 161500151543. The next prime is 161500151689. The reversal of 161500151565 is 565151005161.

It is a happy number.

161500151565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161500151565 - 2⁹ = 161500151053 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1266060 + ... + 1387770.

It is an arithmetic number, because the mean of its divisors is an integer number (8973217200).

Almost surely, 2^161500151565 is an apocalyptic number.

161500151565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161500151565 is a deficient number, since it is larger than the sum of its proper divisors (125642798835).

161500151565 is a wasteful number, since it uses less digits than its factorization.

161500151565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131554 (or 131548 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 161500151565 in words is "one hundred sixty-one billion, five hundred million, one hundred fifty-one thousand, five hundred sixty-five".