27519421519 has 2 divisors, whose sum is σ = 27519421520. Its totient is φ = 27519421518.

The previous prime is 27519421469. The next prime is 27519421549. The reversal of 27519421519 is 91512491572.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27519421519 - 2²³ = 27511032911 is a prime.

It is a super-2 number, since 2×27519421519² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27519421549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13759710759 + 13759710760.

It is an arithmetic number, because the mean of its divisors is an integer number (13759710760).

Almost surely, 2^27519421519 is an apocalyptic number.

27519421519 is a deficient number, since it is larger than the sum of its proper divisors (1).

27519421519 is an equidigital number, since it uses as much as digits as its factorization.

27519421519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 46.

The spelling of 27519421519 in words is "twenty-seven billion, five hundred nineteen million, four hundred twenty-one thousand, five hundred nineteen".