27773553720 has 128 divisors (see below), whose sum is σ = 92140727040. Its totient is φ = 6640727040.

The previous prime is 27773553659. The next prime is 27773553737. The reversal of 27773553720 is 2735537772.

It is a self number, because there is not a number n which added to its sum of digits gives 27773553720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47754 + ... + 240473.

It is an arithmetic number, because the mean of its divisors is an integer number (719849430).

Almost surely, 2^27773553720 is an apocalyptic number.

27773553720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27773553720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46070363520).

27773553720 is an abundant number, since it is smaller than the sum of its proper divisors (64367173320).

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

27773553720 is a wasteful number, since it uses less digits than its factorization.

27773553720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288325 (or 288321 counting only the distinct ones).

The product of its (nonzero) digits is 2160900, while the sum is 48.

The spelling of 27773553720 in words is "twenty-seven billion, seven hundred seventy-three million, five hundred fifty-three thousand, seven hundred twenty".