27777152820 has 48 divisors (see below), whose sum is σ = 79878089088. Its totient is φ = 7207044480.

The previous prime is 27777152807. The next prime is 27777152827. The reversal of 27777152820 is 2825177772.

It is a self number, because there is not a number n which added to its sum of digits gives 27777152820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777152827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6253896 + ... + 6258335.

It is an arithmetic number, because the mean of its divisors is an integer number (1664126856).

Almost surely, 2^27777152820 is an apocalyptic number.

27777152820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27777152820 is an abundant number, since it is smaller than the sum of its proper divisors (52100936268).

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

27777152820 is a wasteful number, since it uses less digits than its factorization.

27777152820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12512280 (or 12512278 counting only the distinct ones).

The product of its (nonzero) digits is 768320, while the sum is 48.

The spelling of 27777152820 in words is "twenty-seven billion, seven hundred seventy-seven million, one hundred fifty-two thousand, eight hundred twenty".