1604144701 has 4 divisors (see below), whose sum is σ = 1698506172. Its totient is φ = 1509783232.

The previous prime is 1604144699. The next prime is 1604144743. The reversal of 1604144701 is 1074414061.

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 1461915225 + 142229476 = 38235^2 + 11926^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604144701 - 2¹ = 1604144699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1604144701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604144791) 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, 47180710 + ... + 47180743.

It is an arithmetic number, because the mean of its divisors is an integer number (424626543).

Almost surely, 2^1604144701 is an apocalyptic number.

It is an amenable number.

1604144701 is a deficient number, since it is larger than the sum of its proper divisors (94361471).

1604144701 is an equidigital number, since it uses as much as digits as its factorization.

1604144701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94361470.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1604144701 is about 40051.7752540384. The cubic root of 1604144701 is about 1170.6161560865.

Adding to 1604144701 its reverse (1074414061), we get a palindrome (2678558762).

The spelling of 1604144701 in words is "one billion, six hundred four million, one hundred forty-four thousand, seven hundred one".