161161299 has 32 divisors (see below), whose sum is σ = 268316160. Its totient is φ = 94859424.

The previous prime is 161161277. The next prime is 161161303. The reversal of 161161299 is 992161161.

It is not a de Polignac number, because 161161299 - 2⁷ = 161161171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161161229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1909 + ... + 18054.

It is an arithmetic number, because the mean of its divisors is an integer number (8384880).

Almost surely, 2^161161299 is an apocalyptic number.

161161299 is a deficient number, since it is larger than the sum of its proper divisors (107154861).

161161299 is a wasteful number, since it uses less digits than its factorization.

161161299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20008 (or 20002 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 161161299 is about 12694.9320202985. The cubic root of 161161299 is about 544.1937960683.

The spelling of 161161299 in words is "one hundred sixty-one million, one hundred sixty-one thousand, two hundred ninety-nine".