27780648632 has 64 divisors (see below), whose sum is σ = 57275134560. Its totient is φ = 12527654400.

The previous prime is 27780648631. The next prime is 27780648659. The reversal of 27780648632 is 23684608772.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27780648631) 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, 8234498 + ... + 8237870.

Almost surely, 2^27780648632 is an apocalyptic number.

27780648632 is a gapful number since it is divisible by the number (22) 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 27780648632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28637567280).

27780648632 is an abundant number, since it is smaller than the sum of its proper divisors (29494485928).

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

27780648632 is a wasteful number, since it uses less digits than its factorization.

27780648632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104 (or 4100 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 27780648632 in words is "twenty-seven billion, seven hundred eighty million, six hundred forty-eight thousand, six hundred thirty-two".