161825658 has 16 divisors (see below), whose sum is σ = 324759456. Its totient is φ = 53757200.

The previous prime is 161825639. The next prime is 161825659. The reversal of 161825658 is 856528161.

161825658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161825659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44268 + ... + 47783.

It is an arithmetic number, because the mean of its divisors is an integer number (20297466).

Almost surely, 2^161825658 is an apocalyptic number.

161825658 is an abundant number, since it is smaller than the sum of its proper divisors (162933798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161825658 is a wasteful number, since it uses less digits than its factorization.

161825658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92349.

The product of its digits is 115200, while the sum is 42.

The square root of 161825658 is about 12721.0714171409. The cubic root of 161825658 is about 544.9405518301.

The spelling of 161825658 in words is "one hundred sixty-one million, eight hundred twenty-five thousand, six hundred fifty-eight".