1655261772 has 48 divisors (see below), whose sum is σ = 3895836672. Its totient is φ = 546981120.

The previous prime is 1655261759. The next prime is 1655261791. The reversal of 1655261772 is 2771625561.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 771333 + ... + 773475.

It is an arithmetic number, because the mean of its divisors is an integer number (81163264).

Almost surely, 2^1655261772 is an apocalyptic number.

1655261772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1655261772 is an abundant number, since it is smaller than the sum of its proper divisors (2240574900).

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

1655261772 is a wasteful number, since it uses less digits than its factorization.

1655261772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678 (or 2676 counting only the distinct ones).

The product of its digits is 176400, while the sum is 42.

The square root of 1655261772 is about 40684.9084059434. The cubic root of 1655261772 is about 1182.9205096945.

The spelling of 1655261772 in words is "one billion, six hundred fifty-five million, two hundred sixty-one thousand, seven hundred seventy-two".