1604426619 has 4 divisors (see below), whose sum is σ = 2139235496. Its totient is φ = 1069617744.

The previous prime is 1604426611. The next prime is 1604426623. The reversal of 1604426619 is 9166244061.

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

It is not a de Polignac number, because 1604426619 - 2³ = 1604426611 is a prime.

It is a super-2 number, since 2×1604426619² = 5148369551511542322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604426611) 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, 267404434 + ... + 267404439.

It is an arithmetic number, because the mean of its divisors is an integer number (534808874).

Almost surely, 2^1604426619 is an apocalyptic number.

1604426619 is a deficient number, since it is larger than the sum of its proper divisors (534808877).

1604426619 is an equidigital number, since it uses as much as digits as its factorization.

1604426619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534808876.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 1604426619 is about 40055.2945189522. The cubic root of 1604426619 is about 1170.6847281287.

The spelling of 1604426619 in words is "one billion, six hundred four million, four hundred twenty-six thousand, six hundred nineteen".