27680442615 has 48 divisors (see below), whose sum is σ = 57217724928. Its totient is φ = 12103743168.

The previous prime is 27680442613. The next prime is 27680442641. The reversal of 27680442615 is 51624408672.

27680442615 is a `hidden beast` number, since 2 + 76 + 80 + 442 + 61 + 5 = 666.

It is not a de Polignac number, because 27680442615 - 2¹ = 27680442613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27680442613) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1903069 + ... + 1917558.

It is an arithmetic number, because the mean of its divisors is an integer number (1192035936).

Almost surely, 2^27680442615 is an apocalyptic number.

27680442615 is an abundant number, since it is smaller than the sum of its proper divisors (29537282313).

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

27680442615 is a wasteful number, since it uses less digits than its factorization.

27680442615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820668 (or 3820665 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 27680442615 in words is "twenty-seven billion, six hundred eighty million, four hundred forty-two thousand, six hundred fifteen".