1604221405452 has 72 divisors (see below), whose sum is σ = 4111202152512. Its totient is φ = 527385600000.

The previous prime is 1604221405447. The next prime is 1604221405477. The reversal of 1604221405452 is 2545041224061.

1604221405452 is a `hidden beast` number, since 1 + 60 + 4 + 2 + 2 + 140 + 5 + 452 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76077 + ... + 1792827.

It is an arithmetic number, because the mean of its divisors is an integer number (57100029896).

Almost surely, 2^{1604221405452} is an apocalyptic number.

1604221405452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1604221405452 is an abundant number, since it is smaller than the sum of its proper divisors (2506980747060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1604221405452 is a wasteful number, since it uses less digits than its factorization.

1604221405452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717119 (or 1717114 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 1604221405452 in words is "one trillion, six hundred four billion, two hundred twenty-one million, four hundred five thousand, four hundred fifty-two".