16151989 has 8 divisors (see below), whose sum is σ = 19545408. Its totient is φ = 13030080.

The previous prime is 16151981. The next prime is 16151999. The reversal of 16151989 is 98915161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16151989 - 2³ = 16151981 is a prime.

It is a super-2 number, since 2×16151989² = 521773497312242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16151981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67747 + ... + 67984.

It is an arithmetic number, because the mean of its divisors is an integer number (2443176).

Almost surely, 2^16151989 is an apocalyptic number.

It is an amenable number.

16151989 is a deficient number, since it is larger than the sum of its proper divisors (3393419).

16151989 is a wasteful number, since it uses less digits than its factorization.

16151989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135755.

The product of its digits is 19440, while the sum is 40.

The square root of 16151989 is about 4018.9537195643. The cubic root of 16151989 is about 252.7795890043.

The spelling of 16151989 in words is "sixteen million, one hundred fifty-one thousand, nine hundred eighty-nine".