161386902 has 12 divisors (see below), whose sum is σ = 349671660. Its totient is φ = 53795628.

The previous prime is 161386877. The next prime is 161386903. The reversal of 161386902 is 209683161.

161386902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161386903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4482952 + ... + 4482987.

It is an arithmetic number, because the mean of its divisors is an integer number (29139305).

Almost surely, 2^161386902 is an apocalyptic number.

161386902 is an abundant number, since it is smaller than the sum of its proper divisors (188284758).

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

161386902 is a wasteful number, since it uses less digits than its factorization.

161386902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8965947 (or 8965944 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 161386902 is about 12703.8144665293. The cubic root of 161386902 is about 544.4476090920.

The spelling of 161386902 in words is "one hundred sixty-one million, three hundred eighty-six thousand, nine hundred two".