81382059953 has 2 divisors, whose sum is σ = 81382059954. Its totient is φ = 81382059952.

The previous prime is 81382059923. The next prime is 81382060049. The reversal of 81382059953 is 35995028318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71948405824 + 9433654129 = 268232^2 + 97127^2 .

It is a cyclic number.

It is not a de Polignac number, because 81382059953 - 2⁸ = 81382059697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81382059895 and 81382059904.

It is not a weakly prime, because it can be changed into another prime (81382059923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40691029976 + 40691029977.

It is an arithmetic number, because the mean of its divisors is an integer number (40691029977).

Almost surely, 2^81382059953 is an apocalyptic number.

It is an amenable number.

81382059953 is a deficient number, since it is larger than the sum of its proper divisors (1).

81382059953 is an equidigital number, since it uses as much as digits as its factorization.

81382059953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 81382059953 in words is "eighty-one billion, three hundred eighty-two million, fifty-nine thousand, nine hundred fifty-three".