161506455 has 32 divisors (see below), whose sum is σ = 284836608. Its totient is φ = 77491200.

The previous prime is 161506427. The next prime is 161506487. The reversal of 161506455 is 554605161.

It is not a de Polignac number, because 161506455 - 2¹² = 161502359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10960 + ... + 21050.

It is an arithmetic number, because the mean of its divisors is an integer number (8901144).

Almost surely, 2^161506455 is an apocalyptic number.

161506455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161506455 is a deficient number, since it is larger than the sum of its proper divisors (123330153).

161506455 is a wasteful number, since it uses less digits than its factorization.

161506455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 161506455 is about 12708.5189931793. The cubic root of 161506455 is about 544.5820154537.

The spelling of 161506455 in words is "one hundred sixty-one million, five hundred six thousand, four hundred fifty-five".