827355455381 has 16 divisors (see below), whose sum is σ = 1019141633664. Its totient is φ = 654059340864.

The previous prime is 827355455359. The next prime is 827355455387. The reversal of 827355455381 is 183554553728.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-827355455381 is a prime.

It is a super-2 number, since 2×827355455381² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827355455387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3721730 + ... + 3937763.

It is an arithmetic number, because the mean of its divisors is an integer number (63696352104).

Almost surely, 2^827355455381 is an apocalyptic number.

It is an amenable number.

827355455381 is a deficient number, since it is larger than the sum of its proper divisors (191786178283).

827355455381 is a wasteful number, since it uses less digits than its factorization.

827355455381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7660700.

The product of its digits is 20160000, while the sum is 56.

The spelling of 827355455381 in words is "eight hundred twenty-seven billion, three hundred fifty-five million, four hundred fifty-five thousand, three hundred eighty-one".