1604469251 has 16 divisors (see below), whose sum is σ = 2011446528. Its totient is φ = 1243317600.

The previous prime is 1604469241. The next prime is 1604469287. The reversal of 1604469251 is 1529644061.

It is not a de Polignac number, because 1604469251 - 2¹⁰ = 1604468227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604469211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43625 + ... + 71498.

It is an arithmetic number, because the mean of its divisors is an integer number (125715408).

Almost surely, 2^1604469251 is an apocalyptic number.

1604469251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1604469251 is a deficient number, since it is larger than the sum of its proper divisors (406977277).

1604469251 is a wasteful number, since it uses less digits than its factorization.

1604469251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115322.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1604469251 is about 40055.8266797728. The cubic root of 1604469251 is about 1170.6950969813.

The spelling of 1604469251 in words is "one billion, six hundred four million, four hundred sixty-nine thousand, two hundred fifty-one".