16256886973 has 4 divisors (see below), whose sum is σ = 17213174460. Its totient is φ = 15300599488.

The previous prime is 16256886959. The next prime is 16256886983. The reversal of 16256886973 is 37968865261.

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 10854930969 + 5401956004 = 104187^2 + 73498^2 .

It is not a de Polignac number, because 16256886973 - 2²⁹ = 15720016061 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 (16256886983) 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, 478143718 + ... + 478143751.

It is an arithmetic number, because the mean of its divisors is an integer number (4303293615).

Almost surely, 2^16256886973 is an apocalyptic number.

It is an amenable number.

16256886973 is a deficient number, since it is larger than the sum of its proper divisors (956287487).

16256886973 is an equidigital number, since it uses as much as digits as its factorization.

16256886973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956287486.

The product of its digits is 26127360, while the sum is 61.

The spelling of 16256886973 in words is "sixteen billion, two hundred fifty-six million, eight hundred eighty-six thousand, nine hundred seventy-three".