81036029051 has 2 divisors, whose sum is σ = 81036029052. Its totient is φ = 81036029050.

The previous prime is 81036029047. The next prime is 81036029089. The reversal of 81036029051 is 15092063018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81036029051 - 2² = 81036029047 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (81036022051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40518014525 + 40518014526.

It is an arithmetic number, because the mean of its divisors is an integer number (40518014526).

Almost surely, 2^81036029051 is an apocalyptic number.

81036029051 is a deficient number, since it is larger than the sum of its proper divisors (1).

81036029051 is an equidigital number, since it uses as much as digits as its factorization.

81036029051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 81036029051 in words is "eighty-one billion, thirty-six million, twenty-nine thousand, fifty-one".