27821078453 has 16 divisors (see below), whose sum is σ = 33781777920. Its totient is φ = 22380404976.

The previous prime is 27821078431. The next prime is 27821078479. The reversal of 27821078453 is 35487012872.

It is a cyclic number.

It is not a de Polignac number, because 27821078453 - 2¹⁰ = 27821077429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27821078398 and 27821078407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27821078413) 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, 963251 + ... + 991712.

It is an arithmetic number, because the mean of its divisors is an integer number (2111361120).

Almost surely, 2^27821078453 is an apocalyptic number.

It is an amenable number.

27821078453 is a deficient number, since it is larger than the sum of its proper divisors (5960699467).

27821078453 is a wasteful number, since it uses less digits than its factorization.

27821078453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955096.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 27821078453 in words is "twenty-seven billion, eight hundred twenty-one million, seventy-eight thousand, four hundred fifty-three".