27129893751 has 24 divisors (see below), whose sum is σ = 41518030320. Its totient is φ = 17012318976.

The previous prime is 27129893701. The next prime is 27129893779. The reversal of 27129893751 is 15739892172.

It is a happy number.

27129893751 is a `hidden beast` number, since 271 + 298 + 9 + 37 + 51 = 666.

It is not a de Polignac number, because 27129893751 - 2¹⁴ = 27129877367 is a prime.

It is a super-2 number, since 2×27129893751² (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 (27129893701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202236 + ... + 308478.

It is an arithmetic number, because the mean of its divisors is an integer number (1729917930).

Almost surely, 2^27129893751 is an apocalyptic number.

27129893751 is a deficient number, since it is larger than the sum of its proper divisors (14388136569).

27129893751 is a wasteful number, since it uses less digits than its factorization.

27129893751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107935 (or 107932 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The spelling of 27129893751 in words is "twenty-seven billion, one hundred twenty-nine million, eight hundred ninety-three thousand, seven hundred fifty-one".