27727078821 has 16 divisors (see below), whose sum is σ = 40015350144. Its totient is φ = 16976199744.

The previous prime is 27727078811. The next prime is 27727078823. The reversal of 27727078821 is 12887072772.

It is not a de Polignac number, because 27727078821 - 2¹³ = 27727070629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27727078823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1796761 + ... + 1812126.

It is an arithmetic number, because the mean of its divisors is an integer number (2500959384).

Almost surely, 2^27727078821 is an apocalyptic number.

It is an amenable number.

27727078821 is a deficient number, since it is larger than the sum of its proper divisors (12288271323).

27727078821 is a wasteful number, since it uses less digits than its factorization.

27727078821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609100.

The product of its (nonzero) digits is 1229312, while the sum is 51.

The spelling of 27727078821 in words is "twenty-seven billion, seven hundred twenty-seven million, seventy-eight thousand, eight hundred twenty-one".