27730018780 has 24 divisors (see below), whose sum is σ = 58494183552. Its totient is φ = 11042265792.

The previous prime is 27730018777. The next prime is 27730018781. The reversal of 27730018780 is 8781003772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27730018781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3104287 + ... + 3113206.

It is an arithmetic number, because the mean of its divisors is an integer number (2437257648).

Almost surely, 2^27730018780 is an apocalyptic number.

27730018780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27730018780 is an abundant number, since it is smaller than the sum of its proper divisors (30764164772).

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

27730018780 is a wasteful number, since it uses less digits than its factorization.

27730018780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217725 (or 6217723 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 43.

The spelling of 27730018780 in words is "twenty-seven billion, seven hundred thirty million, eighteen thousand, seven hundred eighty".