27953612919 has 16 divisors (see below), whose sum is σ = 42748656640. Its totient is φ = 18034588440.

The previous prime is 27953612909. The next prime is 27953612957. The reversal of 27953612919 is 91921635972.

27953612919 is a `hidden beast` number, since 2 + 7 + 9 + 5 + 3 + 612 + 9 + 19 = 666.

It is not a de Polignac number, because 27953612919 - 2²³ = 27945224311 is a prime.

It is a super-2 number, since 2×27953612919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27953612909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16697857 + ... + 16699530.

It is an arithmetic number, because the mean of its divisors is an integer number (2671791040).

Almost surely, 2^27953612919 is an apocalyptic number.

27953612919 is a deficient number, since it is larger than the sum of its proper divisors (14795043721).

27953612919 is a wasteful number, since it uses less digits than its factorization.

27953612919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33397427 (or 33397421 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 27953612919 in words is "twenty-seven billion, nine hundred fifty-three million, six hundred twelve thousand, nine hundred nineteen".