275555664 has 30 divisors (see below), whose sum is σ = 771173546. Its totient is φ = 91851840.

The previous prime is 275555647. The next prime is 275555671. The reversal of 275555664 is 466555572.

It can be written as a sum of positive squares in only one way, i.e., 161493264 + 114062400 = 12708^2 + 10680^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 956647 + ... + 956934.

Almost surely, 2^275555664 is an apocalyptic number.

275555664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

275555664 is an abundant number, since it is smaller than the sum of its proper divisors (495617882).

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

275555664 is a wasteful number, since it uses less digits than its factorization.

275555664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913595 (or 1913586 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 45.

The square root of 275555664 is about 16599.8693970766. The cubic root of 275555664 is about 650.7334238107.

The spelling of 275555664 in words is "two hundred seventy-five million, five hundred fifty-five thousand, six hundred sixty-four".