81400850603 has 2 divisors, whose sum is σ = 81400850604. Its totient is φ = 81400850602.

The previous prime is 81400850599. The next prime is 81400850633. The reversal of 81400850603 is 30605800418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81400850603 - 2² = 81400850599 is a prime.

It is not a weakly prime, because it can be changed into another prime (81400850633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40700425301 + 40700425302.

It is an arithmetic number, because the mean of its divisors is an integer number (40700425302).

Almost surely, 2^81400850603 is an apocalyptic number.

81400850603 is a deficient number, since it is larger than the sum of its proper divisors (1).

81400850603 is an equidigital number, since it uses as much as digits as its factorization.

81400850603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 81400850603 in words is "eighty-one billion, four hundred million, eight hundred fifty thousand, six hundred three".