276655563820 has 24 divisors (see below), whose sum is σ = 580987121904. Its totient is φ = 110660237376.

The previous prime is 276655563817. The next prime is 276655563829. The reversal of 276655563820 is 28365556672.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (276655563829) 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 7 ways as a sum of consecutive naturals, for example, 1601082 + ... + 1765438.

It is an arithmetic number, because the mean of its divisors is an integer number (24207796746).

Almost surely, 2^276655563820 is an apocalyptic number.

276655563820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

276655563820 is an abundant number, since it is smaller than the sum of its proper divisors (304331558084).

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

276655563820 is a wasteful number, since it uses less digits than its factorization.

276655563820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248529 (or 248527 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 276655563820 in words is "two hundred seventy-six billion, six hundred fifty-five million, five hundred sixty-three thousand, eight hundred twenty".