161426565 has 48 divisors (see below), whose sum is σ = 295913280. Its totient is φ = 81406944.

The previous prime is 161426563. The next prime is 161426569. The reversal of 161426565 is 565624161.

161426565 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 161426565 - 2¹ = 161426563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161426563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308394 + ... + 308916.

It is an arithmetic number, because the mean of its divisors is an integer number (6164860).

Almost surely, 2^161426565 is an apocalyptic number.

161426565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161426565 is a deficient number, since it is larger than the sum of its proper divisors (134486715).

161426565 is an equidigital number, since it uses as much as digits as its factorization.

161426565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 550 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 161426565 is about 12705.3754371919. The cubic root of 161426565 is about 544.4922072109.

The spelling of 161426565 in words is "one hundred sixty-one million, four hundred twenty-six thousand, five hundred sixty-five".