161161025 has 12 divisors (see below), whose sum is σ = 200891904. Its totient is φ = 128250000.

The previous prime is 161160997. The next prime is 161161043. The reversal of 161161025 is 520161161.

161161025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161161025 - 2¹⁶ = 161095489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12101 + ... + 21650.

It is an arithmetic number, because the mean of its divisors is an integer number (16740992).

Almost surely, 2^161161025 is an apocalyptic number.

It is an amenable number.

161161025 is a deficient number, since it is larger than the sum of its proper divisors (39730879).

161161025 is a wasteful number, since it uses less digits than its factorization.

161161025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33952 (or 33947 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 161161025 is about 12694.9212285859. The cubic root of 161161025 is about 544.1934876626.

The spelling of 161161025 in words is "one hundred sixty-one million, one hundred sixty-one thousand, twenty-five".