27156732780 has 48 divisors (see below), whose sum is σ = 76432868064. Its totient is φ = 7204270080.

The previous prime is 27156732761. The next prime is 27156732803. The reversal of 27156732780 is 8723765172.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1160991 + ... + 1184150.

It is an arithmetic number, because the mean of its divisors is an integer number (1592351418).

Almost surely, 2^27156732780 is an apocalyptic number.

27156732780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27156732780 is an abundant number, since it is smaller than the sum of its proper divisors (49276135284).

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

27156732780 is a wasteful number, since it uses less digits than its factorization.

27156732780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345346 (or 2345344 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 27156732780 in words is "twenty-seven billion, one hundred fifty-six million, seven hundred thirty-two thousand, seven hundred eighty".