8213727820881 has 64 divisors (see below), whose sum is σ = 12493426176000. Its totient is φ = 4756651361280.

The previous prime is 8213727820849. The next prime is 8213727820951. The reversal of 8213727820881 is 1880287273128.

It is not a de Polignac number, because 8213727820881 - 2⁵ = 8213727820849 is a prime.

It is a super-2 number, since 2×8213727820881² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8213727820801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11882905 + ... + 12555113.

It is an arithmetic number, because the mean of its divisors is an integer number (195209784000).

Almost surely, 2^{8213727820881} is an apocalyptic number.

It is an amenable number.

8213727820881 is a deficient number, since it is larger than the sum of its proper divisors (4279698355119).

8213727820881 is a wasteful number, since it uses less digits than its factorization.

8213727820881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672454.

The product of its (nonzero) digits is 4816896, while the sum is 57.

The spelling of 8213727820881 in words is "eight trillion, two hundred thirteen billion, seven hundred twenty-seven million, eight hundred twenty thousand, eight hundred eighty-one".