161107550 has 12 divisors (see below), whose sum is σ = 299660136. Its totient is φ = 64443000.

The previous prime is 161107549. The next prime is 161107601. The reversal of 161107550 is 55701161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1611026 + ... + 1611125.

It is an arithmetic number, because the mean of its divisors is an integer number (24971678).

Almost surely, 2^161107550 is an apocalyptic number.

161107550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161107550 is a deficient number, since it is larger than the sum of its proper divisors (138552586).

161107550 is a wasteful number, since it uses less digits than its factorization.

161107550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222163 (or 3222158 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 161107550 is about 12692.8148966256. The cubic root of 161107550 is about 544.1332912101.

The spelling of 161107550 in words is "one hundred sixty-one million, one hundred seven thousand, five hundred fifty".