27019639431 has 24 divisors (see below), whose sum is σ = 39642142176. Its totient is φ = 17730800640.

The previous prime is 27019639429. The next prime is 27019639441. The reversal of 27019639431 is 13493691072.

27019639431 is a `hidden beast` number, since 2 + 7 + 0 + 1 + 9 + 639 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 27019639431 - 2¹ = 27019639429 is a prime.

It is a super-2 number, since 2×27019639431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27019639421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289591 + ... + 371351.

It is an arithmetic number, because the mean of its divisors is an integer number (1651755924).

Almost surely, 2^27019639431 is an apocalyptic number.

27019639431 is a deficient number, since it is larger than the sum of its proper divisors (12622502745).

27019639431 is a wasteful number, since it uses less digits than its factorization.

27019639431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82343 (or 82340 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 27019639431 in words is "twenty-seven billion, nineteen million, six hundred thirty-nine thousand, four hundred thirty-one".