161510655 has 16 divisors (see below), whose sum is σ = 258993504. Its totient is φ = 85946880.

The previous prime is 161510653. The next prime is 161510689. The reversal of 161510655 is 556015161.

It is not a de Polignac number, because 161510655 - 2¹ = 161510653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161510653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4926 + ... + 18635.

It is an arithmetic number, because the mean of its divisors is an integer number (16187094).

Almost surely, 2^161510655 is an apocalyptic number.

161510655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161510655 is a deficient number, since it is larger than the sum of its proper divisors (97482849).

161510655 is a wasteful number, since it uses less digits than its factorization.

161510655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24026.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 161510655 is about 12708.6842355926. The cubic root of 161510655 is about 544.5867360589.

It can be divided in two parts, 1615106 and 55, that added together give a palindrome (1615161).

The spelling of 161510655 in words is "one hundred sixty-one million, five hundred ten thousand, six hundred fifty-five".