16185356890 has 8 divisors (see below), whose sum is σ = 29133642420. Its totient is φ = 6474142752.

The previous prime is 16185356857. The next prime is 16185356893. The reversal of 16185356890 is 9865358161.

It can be written as a sum of positive squares in 2 ways, for example, as 16134334441 + 51022449 = 127021^2 + 7143^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16185356893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809267835 + ... + 809267854.

Almost surely, 2^16185356890 is an apocalyptic number.

16185356890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16185356890 is a deficient number, since it is larger than the sum of its proper divisors (12948285530).

16185356890 is a wasteful number, since it uses less digits than its factorization.

16185356890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618535696.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 16185356890 in words is "sixteen billion, one hundred eighty-five million, three hundred fifty-six thousand, eight hundred ninety".