27797665719 has 16 divisors (see below), whose sum is σ = 39249107712. Its totient is φ = 17439297408.

The previous prime is 27797665717. The next prime is 27797665723. The reversal of 27797665719 is 91756679772.

It is not a de Polignac number, because 27797665719 - 2¹ = 27797665717 is a prime.

It is a super-2 number, since 2×27797665719² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27797665719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27797665717) 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, 388432 + ... + 454394.

It is an arithmetic number, because the mean of its divisors is an integer number (2453069232).

Almost surely, 2^27797665719 is an apocalyptic number.

27797665719 is a deficient number, since it is larger than the sum of its proper divisors (11451441993).

27797665719 is a wasteful number, since it uses less digits than its factorization.

27797665719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74246.

The product of its digits is 70013160, while the sum is 66.

The spelling of 27797665719 in words is "twenty-seven billion, seven hundred ninety-seven million, six hundred sixty-five thousand, seven hundred nineteen".