16496570190409 has 9 divisors (see below), whose sum is σ = 16542434678133. Its totient is φ = 16450832546592.

The previous prime is 16496570190389. The next prime is 16496570190427. The reversal of 16496570190409 is 90409107569461.

The square root of 16496570190409 is 4061597.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4734606087225 + 11761964103184 = 2175915^2 + 3429572^2 .

It is not a de Polignac number, because 16496570190409 - 2⁷ = 16496570190281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16496570190509) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1514970237 + ... + 1514981125.

Almost surely, 2^{16496570190409} is an apocalyptic number.

16496570190409 is the 4061597-th square number.

16496570190409 is the 2030799-th centered octagonal number.

It is an amenable number.

16496570190409 is a deficient number, since it is larger than the sum of its proper divisors (45864487724).

16496570190409 is an frugal number, since it uses more digits than its factorization.

16496570190409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22524 (or 11262 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 61.

The spelling of 16496570190409 in words is "sixteen trillion, four hundred ninety-six billion, five hundred seventy million, one hundred ninety thousand, four hundred nine".