1655244671 has 4 divisors (see below), whose sum is σ = 1659015600. Its totient is φ = 1651473744.

The previous prime is 1655244667. The next prime is 1655244713. The reversal of 1655244671 is 1764425561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1655244671 - 2² = 1655244667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655244601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1884806 + ... + 1885683.

It is an arithmetic number, because the mean of its divisors is an integer number (414753900).

Almost surely, 2^1655244671 is an apocalyptic number.

1655244671 is a deficient number, since it is larger than the sum of its proper divisors (3770929).

1655244671 is an equidigital number, since it uses as much as digits as its factorization.

1655244671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770928.

The product of its digits is 201600, while the sum is 41.

The square root of 1655244671 is about 40684.6982414765. The cubic root of 1655244671 is about 1182.9164359796.

The spelling of 1655244671 in words is "one billion, six hundred fifty-five million, two hundred forty-four thousand, six hundred seventy-one".