161867650 has 96 divisors (see below), whose sum is σ = 367297920. Its totient is φ = 51840000.

The previous prime is 161867627. The next prime is 161867677. The reversal of 161867650 is 56768161.

161867650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161867650² = 52402272233045000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671530 + ... + 671770.

It is an arithmetic number, because the mean of its divisors is an integer number (3826020).

Almost surely, 2^161867650 is an apocalyptic number.

161867650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161867650 is an abundant number, since it is smaller than the sum of its proper divisors (205430270).

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

161867650 is a wasteful number, since it uses less digits than its factorization.

161867650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 161867650 is about 12722.7217999923. The cubic root of 161867650 is about 544.9876831377.

The spelling of 161867650 in words is "one hundred sixty-one million, eight hundred sixty-seven thousand, six hundred fifty".