161441518 has 64 divisors (see below), whose sum is σ = 303367680. Its totient is φ = 62899200.

The previous prime is 161441509. The next prime is 161441543. The reversal of 161441518 is 815144161.

It is a self number, because there is not a number n which added to its sum of digits gives 161441518.

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, 1232313 + ... + 1232443.

It is an arithmetic number, because the mean of its divisors is an integer number (4740120).

Almost surely, 2^161441518 is an apocalyptic number.

161441518 is a deficient number, since it is larger than the sum of its proper divisors (141926162).

161441518 is a wasteful number, since it uses less digits than its factorization.

161441518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its digits is 3840, while the sum is 31.

The square root of 161441518 is about 12705.9638752831. The cubic root of 161441518 is about 544.5090188606.

Adding to 161441518 its reverse (815144161), we get a palindrome (976585679).

The spelling of 161441518 in words is "one hundred sixty-one million, four hundred forty-one thousand, five hundred eighteen".