27642973477 has 8 divisors (see below), whose sum is σ = 31595054400. Its totient is φ = 23691663744.

The previous prime is 27642973447. The next prime is 27642973481. The reversal of 27642973477 is 77437924672.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27642973477 - 2⁷ = 27642973349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27642973447) 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 7 ways as a sum of consecutive naturals, for example, 113827 + ... + 261232.

It is an arithmetic number, because the mean of its divisors is an integer number (3949381800).

Almost surely, 2^27642973477 is an apocalyptic number.

It is an amenable number.

27642973477 is a deficient number, since it is larger than the sum of its proper divisors (3952080923).

27642973477 is a wasteful number, since it uses less digits than its factorization.

27642973477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385595.

The product of its digits is 24893568, while the sum is 58.

The spelling of 27642973477 in words is "twenty-seven billion, six hundred forty-two million, nine hundred seventy-three thousand, four hundred seventy-seven".