81500236963 has 2 divisors, whose sum is σ = 81500236964. Its totient is φ = 81500236962.

The previous prime is 81500236919. The next prime is 81500237023. The reversal of 81500236963 is 36963200518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81500236963 - 2²⁹ = 80963366051 is a prime.

It is not a weakly prime, because it can be changed into another prime (81500230963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40750118481 + 40750118482.

It is an arithmetic number, because the mean of its divisors is an integer number (40750118482).

Almost surely, 2^81500236963 is an apocalyptic number.

81500236963 is a deficient number, since it is larger than the sum of its proper divisors (1).

81500236963 is an equidigital number, since it uses as much as digits as its factorization.

81500236963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 81500236963 in words is "eighty-one billion, five hundred million, two hundred thirty-six thousand, nine hundred sixty-three".