826227836721 has 12 divisors (see below), whose sum is σ = 1363931667072. Its totient is φ = 472130192376.

The previous prime is 826227836663. The next prime is 826227836741. The reversal of 826227836721 is 127638722628.

826227836721 is a `hidden beast` number, since 8 + 2 + 6 + 2 + 278 + 367 + 2 + 1 = 666.

It is not a de Polignac number, because 826227836721 - 2⁹ = 826227836209 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (826227836741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6557363721 + ... + 6557363846.

It is an arithmetic number, because the mean of its divisors is an integer number (113660972256).

Almost surely, 2^826227836721 is an apocalyptic number.

It is an amenable number.

826227836721 is a deficient number, since it is larger than the sum of its proper divisors (537703830351).

826227836721 is a wasteful number, since it uses less digits than its factorization.

826227836721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13114727580 (or 13114727577 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 826227836721 in words is "eight hundred twenty-six billion, two hundred twenty-seven million, eight hundred thirty-six thousand, seven hundred twenty-one".