10404402509 has 4 divisors (see below), whose sum is σ = 11016426204. Its totient is φ = 9792378816.

The previous prime is 10404402473. The next prime is 10404402523. The reversal of 10404402509 is 90520440401.

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 6420015625 + 3984386884 = 80125^2 + 63122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10404402509 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 (10404402709) 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, 306011822 + ... + 306011855.

It is an arithmetic number, because the mean of its divisors is an integer number (2754106551).

Almost surely, 2^10404402509 is an apocalyptic number.

It is an amenable number.

10404402509 is a deficient number, since it is larger than the sum of its proper divisors (612023695).

10404402509 is an equidigital number, since it uses as much as digits as its factorization.

10404402509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612023694.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 10404402509 in words is "ten billion, four hundred four million, four hundred two thousand, five hundred nine".