6811227825081 has 4 divisors (see below), whose sum is σ = 9081637100112. Its totient is φ = 4540818550052.

The previous prime is 6811227825043. The next prime is 6811227825091. The reversal of 6811227825081 is 1805287221186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6811227825081 - 2¹⁰ = 6811227824057 is a prime.

It is a super-2 number, since 2×6811227825081² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6811227825011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135204637511 + ... + 1135204637516.

It is an arithmetic number, because the mean of its divisors is an integer number (2270409275028).

Almost surely, 2^{6811227825081} is an apocalyptic number.

It is an amenable number.

6811227825081 is a deficient number, since it is larger than the sum of its proper divisors (2270409275031).

6811227825081 is a wasteful number, since it uses less digits than its factorization.

6811227825081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270409275030.

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 6811227825081 in words is "six trillion, eight hundred eleven billion, two hundred twenty-seven million, eight hundred twenty-five thousand, eighty-one".