27775277780 has 24 divisors (see below), whose sum is σ = 59316697440. Its totient is φ = 10921803680.

The previous prime is 27775277767. The next prime is 27775277801. The reversal of 27775277780 is 8777257772.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11768006 + ... + 11770365.

It is an arithmetic number, because the mean of its divisors is an integer number (2471529060).

Almost surely, 2^27775277780 is an apocalyptic number.

27775277780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27775277780 is an abundant number, since it is smaller than the sum of its proper divisors (31541419660).

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

27775277780 is a wasteful number, since it uses less digits than its factorization.

27775277780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23538439 (or 23538437 counting only the distinct ones).

The product of its (nonzero) digits is 18823840, while the sum is 59.

The spelling of 27775277780 in words is "twenty-seven billion, seven hundred seventy-five million, two hundred seventy-seven thousand, seven hundred eighty".