27871931049 has 32 divisors (see below), whose sum is σ = 38719296000. Its totient is φ = 17819437440.

The previous prime is 27871931033. The next prime is 27871931051. The reversal of 27871931049 is 94013917872.

It is not a de Polignac number, because 27871931049 - 2⁴ = 27871931033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27871930992 and 27871931010.

It is not an unprimeable number, because it can be changed into a prime (27871938049) 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, 7982194 + ... + 7985684.

It is an arithmetic number, because the mean of its divisors is an integer number (1209978000).

Almost surely, 2^27871931049 is an apocalyptic number.

It is an amenable number.

27871931049 is a deficient number, since it is larger than the sum of its proper divisors (10847364951).

27871931049 is a wasteful number, since it uses less digits than its factorization.

27871931049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645.

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 27871931049 in words is "twenty-seven billion, eight hundred seventy-one million, nine hundred thirty-one thousand, forty-nine".