81648000887 has 2 divisors, whose sum is σ = 81648000888. Its totient is φ = 81648000886.

The previous prime is 81648000883. The next prime is 81648000943. The reversal of 81648000887 is 78800084618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81648000887 - 2² = 81648000883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81648000881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40824000443 + 40824000444.

It is an arithmetic number, because the mean of its divisors is an integer number (40824000444).

Almost surely, 2^81648000887 is an apocalyptic number.

81648000887 is a deficient number, since it is larger than the sum of its proper divisors (1).

81648000887 is an equidigital number, since it uses as much as digits as its factorization.

81648000887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 688128, while the sum is 50.

The spelling of 81648000887 in words is "eighty-one billion, six hundred forty-eight million, eight hundred eighty-seven", and thus it is an aban number.