161427750 has 128 divisors (see below), whose sum is σ = 465813504. Its totient is φ = 36800000.

The previous prime is 161427737. The next prime is 161427769. The reversal of 161427750 is 57724161.

161427750 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 (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139675 + ... + 140825.

It is an arithmetic number, because the mean of its divisors is an integer number (3639168).

Almost surely, 2^161427750 is an apocalyptic number.

161427750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161427750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232906752).

161427750 is an abundant number, since it is smaller than the sum of its proper divisors (304385754).

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

161427750 is a wasteful number, since it uses less digits than its factorization.

161427750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 161427750 is about 12705.4220709113. The cubic root of 161427750 is about 544.4935395436.

The spelling of 161427750 in words is "one hundred sixty-one million, four hundred twenty-seven thousand, seven hundred fifty".