427135661187 has 32 divisors (see below), whose sum is σ = 620244441600. Its totient is φ = 260432299008.

The previous prime is 427135661137. The next prime is 427135661189. The reversal of 427135661187 is 781166531724.

It is a happy number.

It is not a de Polignac number, because 427135661187 - 2¹⁰ = 427135660163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (427135661189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17603898 + ... + 17628144.

It is an arithmetic number, because the mean of its divisors is an integer number (19382638800).

Almost surely, 2^427135661187 is an apocalyptic number.

427135661187 is a deficient number, since it is larger than the sum of its proper divisors (193108780413).

427135661187 is a wasteful number, since it uses less digits than its factorization.

427135661187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34955.

The product of its digits is 1693440, while the sum is 51.

The spelling of 427135661187 in words is "four hundred twenty-seven billion, one hundred thirty-five million, six hundred sixty-one thousand, one hundred eighty-seven".