27861121503 has 12 divisors (see below), whose sum is σ = 41734355208. Its totient is φ = 18574080840.

The previous prime is 27861121489. The next prime is 27861121531. The reversal of 27861121503 is 30512116872.

27861121503 is a `hidden beast` number, since 2 + 78 + 61 + 1 + 21 + 503 = 666.

It is not a de Polignac number, because 27861121503 - 2⁶ = 27861121439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27861121543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57327168 + ... + 57327653.

It is an arithmetic number, because the mean of its divisors is an integer number (3477862934).

Almost surely, 2^27861121503 is an apocalyptic number.

27861121503 is a deficient number, since it is larger than the sum of its proper divisors (13873233705).

27861121503 is an equidigital number, since it uses as much as digits as its factorization.

27861121503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114654836 (or 114654824 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 27861121503 in words is "twenty-seven billion, eight hundred sixty-one million, one hundred twenty-one thousand, five hundred three".