1626161822609 has 4 divisors (see below), whose sum is σ = 1626164376816. Its totient is φ = 1626159268404.

The previous prime is 1626161822599. The next prime is 1626161822627. The reversal of 1626161822609 is 9062281616261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1626161822609 is a prime.

It is a super-2 number, since 2×1626161822609² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1626161872609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534302 + ... + 1880904.

It is an arithmetic number, because the mean of its divisors is an integer number (406541094204).

Almost surely, 2^{1626161822609} is an apocalyptic number.

It is an amenable number.

1626161822609 is a deficient number, since it is larger than the sum of its proper divisors (2554207).

1626161822609 is a wasteful number, since it uses less digits than its factorization.

1626161822609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554206.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 1626161822609 in words is "one trillion, six hundred twenty-six billion, one hundred sixty-one million, eight hundred twenty-two thousand, six hundred nine".