1655404672 has 32 divisors (see below), whose sum is σ = 3368056320. Its totient is φ = 810088704.

The previous prime is 1655404627. The next prime is 1655404693. The reversal of 1655404672 is 2764045561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 131568 + ... + 143599.

It is an arithmetic number, because the mean of its divisors is an integer number (105251760).

Almost surely, 2^1655404672 is an apocalyptic number.

It is an amenable number.

1655404672 is an abundant number, since it is smaller than the sum of its proper divisors (1712651648).

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

1655404672 is an equidigital number, since it uses as much as digits as its factorization.

1655404672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275228 (or 275216 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 1655404672 is about 40686.6645474903. The cubic root of 1655404672 is about 1182.9545495222.

The spelling of 1655404672 in words is "one billion, six hundred fifty-five million, four hundred four thousand, six hundred seventy-two".