161868888 has 32 divisors (see below), whose sum is σ = 449636400. Its totient is φ = 53956224.

The previous prime is 161868881. The next prime is 161868901. The reversal of 161868888 is 888868161.

161868888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161868881) 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, 374481 + ... + 374912.

Almost surely, 2^161868888 is an apocalyptic number.

161868888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161868888 is an abundant number, since it is smaller than the sum of its proper divisors (287767512).

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

161868888 is a wasteful number, since it uses less digits than its factorization.

161868888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749408 (or 749398 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 54.

The square root of 161868888 is about 12722.7704530106. The cubic root of 161868888 is about 544.9890725301.

The spelling of 161868888 in words is "one hundred sixty-one million, eight hundred sixty-eight thousand, eight hundred eighty-eight".