27819447252 has 12 divisors (see below), whose sum is σ = 64912043616. Its totient is φ = 9273149080.

The previous prime is 27819447233. The next prime is 27819447319. The reversal of 27819447252 is 25274491872.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 27819447195 and 27819447204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1159143624 + ... + 1159143647.

It is an arithmetic number, because the mean of its divisors is an integer number (5409336968).

Almost surely, 2^27819447252 is an apocalyptic number.

It is an amenable number.

27819447252 is an abundant number, since it is smaller than the sum of its proper divisors (37092596364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27819447252 is a wasteful number, since it uses less digits than its factorization.

27819447252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318287278 (or 2318287276 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The spelling of 27819447252 in words is "twenty-seven billion, eight hundred nineteen million, four hundred forty-seven thousand, two hundred fifty-two".