1601604419 has 4 divisors (see below), whose sum is σ = 1606141896. Its totient is φ = 1597066944.

The previous prime is 1601604397. The next prime is 1601604421. The reversal of 1601604419 is 9144061061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9144061061 = 19301 ⋅473761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601604419 is a prime.

It is a super-2 number, since 2×1601604419² = 5130273429920655122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601604479) 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, 2268209 + ... + 2268914.

It is an arithmetic number, because the mean of its divisors is an integer number (401535474).

Almost surely, 2^1601604419 is an apocalyptic number.

1601604419 is a deficient number, since it is larger than the sum of its proper divisors (4537477).

1601604419 is an equidigital number, since it uses as much as digits as its factorization.

1601604419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537476.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1601604419 is about 40020.0502123623. The cubic root of 1601604419 is about 1169.9979104840.

The spelling of 1601604419 in words is "one billion, six hundred one million, six hundred four thousand, four hundred nineteen".