27761138646 has 36 divisors (see below), whose sum is σ = 55950820668. Its totient is φ = 9182835000.

The previous prime is 27761138641. The next prime is 27761138681. The reversal of 27761138646 is 64683116772.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27761138641) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 102439491 + ... + 102439761.

It is an arithmetic number, because the mean of its divisors is an integer number (1554189463).

Almost surely, 2^27761138646 is an apocalyptic number.

27761138646 is an abundant number, since it is smaller than the sum of its proper divisors (28189682022).

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

27761138646 is an frugal number, since it uses more digits than its factorization.

27761138646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 527 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The spelling of 27761138646 in words is "twenty-seven billion, seven hundred sixty-one million, one hundred thirty-eight thousand, six hundred forty-six".