27661630863 has 32 divisors (see below), whose sum is σ = 39427153920. Its totient is φ = 17220964320.

The previous prime is 27661630837. The next prime is 27661630873. The reversal of 27661630863 is 36803616672.

It is a happy number.

It is not a de Polignac number, because 27661630863 - 2²¹ = 27659533711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27661630873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290248 + ... + 373586.

It is an arithmetic number, because the mean of its divisors is an integer number (1232098560).

Almost surely, 2^27661630863 is an apocalyptic number.

27661630863 is a deficient number, since it is larger than the sum of its proper divisors (11765523057).

27661630863 is a wasteful number, since it uses less digits than its factorization.

27661630863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83499.

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 27661630863 in words is "twenty-seven billion, six hundred sixty-one million, six hundred thirty thousand, eight hundred sixty-three".