27781094473 has 8 divisors (see below), whose sum is σ = 31901735520. Its totient is φ = 23926301280.

The previous prime is 27781094461. The next prime is 27781094501. The reversal of 27781094473 is 37449018772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27781094473 is a prime.

It is a super-2 number, since 2×27781094473² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27781094473.

It is not an unprimeable number, because it can be changed into a prime (27781094443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66461740 + ... + 66462157.

It is an arithmetic number, because the mean of its divisors is an integer number (3987716940).

Almost surely, 2^27781094473 is an apocalyptic number.

It is an amenable number.

27781094473 is a deficient number, since it is larger than the sum of its proper divisors (4120641047).

27781094473 is a wasteful number, since it uses less digits than its factorization.

27781094473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132923927.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 27781094473 in words is "twenty-seven billion, seven hundred eighty-one million, ninety-four thousand, four hundred seventy-three".