27219067491 has 96 divisors (see below), whose sum is σ = 48115952640. Its totient is φ = 13370480640.

The previous prime is 27219067453. The next prime is 27219067511. The reversal of 27219067491 is 19476091272.

It is not a de Polignac number, because 27219067491 - 2¹⁰ = 27219066467 is a prime.

It is a super-2 number, since 2×27219067491² (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 27219067491.

It is not an unprimeable number, because it can be changed into a prime (27219067441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5198811 + ... + 5204043.

It is an arithmetic number, because the mean of its divisors is an integer number (501207840).

Almost surely, 2^27219067491 is an apocalyptic number.

27219067491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27219067491 is a deficient number, since it is larger than the sum of its proper divisors (20896885149).

27219067491 is a wasteful number, since it uses less digits than its factorization.

27219067491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5377 (or 5366 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 27219067491 in words is "twenty-seven billion, two hundred nineteen million, sixty-seven thousand, four hundred ninety-one".