161461740 has 48 divisors (see below), whose sum is σ = 493194240. Its totient is φ = 39142080.

The previous prime is 161461723. The next prime is 161461789. The reversal of 161461740 is 47164161.

161461740 is digitally balanced in base 3, 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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 161461698 and 161461707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121660 + ... + 122979.

It is an arithmetic number, because the mean of its divisors is an integer number (10274880).

Almost surely, 2^161461740 is an apocalyptic number.

161461740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161461740 is an abundant number, since it is smaller than the sum of its proper divisors (331732500).

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

161461740 is a wasteful number, since it uses less digits than its factorization.

161461740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244662 (or 244660 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 161461740 is about 12706.7596184078. The cubic root of 161461740 is about 544.5317527930.

The spelling of 161461740 in words is "one hundred sixty-one million, four hundred sixty-one thousand, seven hundred forty".