1604857428623 has 4 divisors (see below), whose sum is σ = 1604884108320. Its totient is φ = 1604830748928.

The previous prime is 1604857428613. The next prime is 1604857428631. The reversal of 1604857428623 is 3268247584061.

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

It is a cyclic number.

It is not a de Polignac number, because 1604857428623 - 2²⁰ = 1604856380047 is a prime.

It is a super-2 number, since 2×1604857428623² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604857428613) 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, 13249415 + ... + 13369992.

It is an arithmetic number, because the mean of its divisors is an integer number (401221027080).

Almost surely, 2^{1604857428623} is an apocalyptic number.

1604857428623 is a deficient number, since it is larger than the sum of its proper divisors (26679697).

1604857428623 is an equidigital number, since it uses as much as digits as its factorization.

1604857428623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26679696.

The product of its (nonzero) digits is 15482880, while the sum is 56.

The spelling of 1604857428623 in words is "one trillion, six hundred four billion, eight hundred fifty-seven million, four hundred twenty-eight thousand, six hundred twenty-three".