161149720 has 16 divisors (see below), whose sum is σ = 362586960. Its totient is φ = 64459872.

The previous prime is 161149679. The next prime is 161149741. The reversal of 161149720 is 27941161.

161149720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014332 + ... + 2014411.

It is an arithmetic number, because the mean of its divisors is an integer number (22661685).

Almost surely, 2^161149720 is an apocalyptic number.

161149720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161149720 is an abundant number, since it is smaller than the sum of its proper divisors (201437240).

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

161149720 is a wasteful number, since it uses less digits than its factorization.

161149720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028754 (or 4028750 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 161149720 is about 12694.4759639774. The cubic root of 161149720 is about 544.1807628093.

The spelling of 161149720 in words is "one hundred sixty-one million, one hundred forty-nine thousand, seven hundred twenty".