161103537 has 12 divisors (see below), whose sum is σ = 265948800. Its totient is φ = 92059128.

The previous prime is 161103533. The next prime is 161103539. The reversal of 161103537 is 735301161.

161103537 is a `hidden beast` number, since 16 + 110 + 3 + 537 = 666.

It is not a de Polignac number, because 161103537 - 2² = 161103533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161103537.

It is not an unprimeable number, because it can be changed into a prime (161103533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1278537 + ... + 1278662.

It is an arithmetic number, because the mean of its divisors is an integer number (22162400).

Almost surely, 2^161103537 is an apocalyptic number.

It is an amenable number.

161103537 is a deficient number, since it is larger than the sum of its proper divisors (104845263).

161103537 is a wasteful number, since it uses less digits than its factorization.

161103537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557212 (or 2557209 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 161103537 is about 12692.6568140795. The cubic root of 161103537 is about 544.1287732653.

Adding to 161103537 its reverse (735301161), we get a palindrome (896404698).

The spelling of 161103537 in words is "one hundred sixty-one million, one hundred three thousand, five hundred thirty-seven".