81627796237051 has 2 divisors, whose sum is σ = 81627796237052. Its totient is φ = 81627796237050.

The previous prime is 81627796236911. The next prime is 81627796237123. The reversal of 81627796237051 is 15073269772618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81627796237051 - 2¹⁷ = 81627796105979 is a prime.

It is a super-3 number, since 3×81627796237051³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (81627796237751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40813898118525 + 40813898118526.

It is an arithmetic number, because the mean of its divisors is an integer number (40813898118526).

Almost surely, 2^{81627796237051} is an apocalyptic number.

81627796237051 is a deficient number, since it is larger than the sum of its proper divisors (1).

81627796237051 is an equidigital number, since it uses as much as digits as its factorization.

81627796237051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53343360, while the sum is 64.

The spelling of 81627796237051 in words is "eighty-one trillion, six hundred twenty-seven billion, seven hundred ninety-six million, two hundred thirty-seven thousand, fifty-one".