27042729291 has 24 divisors (see below), whose sum is σ = 40204698560. Its totient is φ = 17508441600.

The previous prime is 27042729271. The next prime is 27042729323. The reversal of 27042729291 is 19292724072.

It is a happy number.

27042729291 is a `hidden beast` number, since 270 + 4 + 2 + 7 + 292 + 91 = 666.

It is not a de Polignac number, because 27042729291 - 2⁷ = 27042729163 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27042729221) 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, 268390 + ... + 355131.

Almost surely, 2^27042729291 is an apocalyptic number.

27042729291 is a deficient number, since it is larger than the sum of its proper divisors (13161969269).

27042729291 is a wasteful number, since it uses less digits than its factorization.

27042729291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623667 (or 623664 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 27042729291 in words is "twenty-seven billion, forty-two million, seven hundred twenty-nine thousand, two hundred ninety-one".