361625161 has 4 divisors (see below), whose sum is σ = 371398852. Its totient is φ = 351851472.

The previous prime is 361625123. The next prime is 361625171. The reversal of 361625161 is 161526163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 304153600 + 57471561 = 17440^2 + 7581^2 .

It is a cyclic number.

It is not a de Polignac number, because 361625161 - 2¹¹ = 361623113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361625111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4886790 + ... + 4886863.

It is an arithmetic number, because the mean of its divisors is an integer number (92849713).

Almost surely, 2^361625161 is an apocalyptic number.

It is an amenable number.

361625161 is a deficient number, since it is larger than the sum of its proper divisors (9773691).

361625161 is an equidigital number, since it uses as much as digits as its factorization.

361625161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9773690.

The product of its digits is 6480, while the sum is 31.

The square root of 361625161 is about 19016.4444889154. Note that the first 4 decimals coincide. The cubic root of 361625161 is about 712.4475215683.

The spelling of 361625161 in words is "three hundred sixty-one million, six hundred twenty-five thousand, one hundred sixty-one".