161499000 has 256 divisors, whose sum is σ = 561375360. Its totient is φ = 38400000.

The previous prime is 161498983. The next prime is 161499007. The reversal of 161499000 is 994161.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161499007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1598950 + ... + 1599050.

Almost surely, 2^161499000 is an apocalyptic number.

161499000 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 161499000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280687680).

161499000 is an abundant number, since it is smaller than the sum of its proper divisors (399876360).

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

161499000 is a wasteful number, since it uses less digits than its factorization.

161499000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 161499000 is about 12708.2256826042. The cubic root of 161499000 is about 544.5736361779.

The spelling of 161499000 in words is "one hundred sixty-one million, four hundred ninety-nine thousand".