81675697603 has 2 divisors, whose sum is σ = 81675697604. Its totient is φ = 81675697602.

The previous prime is 81675697591. The next prime is 81675697661. The reversal of 81675697603 is 30679657618.

It is a happy number.

It is an a-pointer prime, because the next prime (81675697661) can be obtained adding 81675697603 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81675697603 - 2²⁵ = 81642143171 is a prime.

It is not a weakly prime, because it can be changed into another prime (81675697903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40837848801 + 40837848802.

It is an arithmetic number, because the mean of its divisors is an integer number (40837848802).

Almost surely, 2^81675697603 is an apocalyptic number.

81675697603 is a deficient number, since it is larger than the sum of its proper divisors (1).

81675697603 is an equidigital number, since it uses as much as digits as its factorization.

81675697603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 81675697603 in words is "eighty-one billion, six hundred seventy-five million, six hundred ninety-seven thousand, six hundred three".