161146740 has 96 divisors (see below), whose sum is σ = 498597120. Its totient is φ = 38680576.

The previous prime is 161146721. The next prime is 161146753. The reversal of 161146740 is 47641161.

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 = 161146698 and 161146707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20026 + ... + 26894.

It is an arithmetic number, because the mean of its divisors is an integer number (5193720).

Almost surely, 2^161146740 is an apocalyptic number.

161146740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161146740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249298560).

161146740 is an abundant number, since it is smaller than the sum of its proper divisors (337450380).

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

161146740 is a wasteful number, since it uses less digits than its factorization.

161146740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6921 (or 6919 counting only the distinct ones).

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

The square root of 161146740 is about 12694.3585895468. The cubic root of 161146740 is about 544.1774084366.

The spelling of 161146740 in words is "one hundred sixty-one million, one hundred forty-six thousand, seven hundred forty".