16260563564621 has 4 divisors (see below), whose sum is σ = 16261099522044. Its totient is φ = 16260027607200.

The previous prime is 16260563564611. The next prime is 16260563564671. The reversal of 16260563564621 is 12646536506261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1141608908521 + 15118954656100 = 1068461^2 + 3888310^2 .

It is a cyclic number.

It is not a de Polignac number, because 16260563564621 - 2²⁶ = 16260496455757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16260563564611) 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, 267933200 + ... + 267993881.

It is an arithmetic number, because the mean of its divisors is an integer number (4065274880511).

Almost surely, 2^{16260563564621} is an apocalyptic number.

It is an amenable number.

16260563564621 is a deficient number, since it is larger than the sum of its proper divisors (535957423).

16260563564621 is an equidigital number, since it uses as much as digits as its factorization.

16260563564621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535957422.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 16260563564621 in words is "sixteen trillion, two hundred sixty billion, five hundred sixty-three million, five hundred sixty-four thousand, six hundred twenty-one".