1604642455 has 16 divisors (see below), whose sum is σ = 2129740704. Its totient is φ = 1152938880.

The previous prime is 1604642447. The next prime is 1604642467. The reversal of 1604642455 is 5542464061.

It is not a de Polignac number, because 1604642455 - 2³ = 1604642447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331201 + ... + 336010.

It is an arithmetic number, because the mean of its divisors is an integer number (133108794).

Almost surely, 2^1604642455 is an apocalyptic number.

1604642455 is a deficient number, since it is larger than the sum of its proper divisors (525098249).

1604642455 is a wasteful number, since it uses less digits than its factorization.

1604642455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667266.

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 1604642455 is about 40057.9886539502. The cubic root of 1604642455 is about 1170.7372213531.

The spelling of 1604642455 in words is "one billion, six hundred four million, six hundred forty-two thousand, four hundred fifty-five".