81593145118359 has 40 divisors (see below), whose sum is σ = 146629842170240. Its totient is φ = 44170725171024.

The previous prime is 81593145118301. The next prime is 81593145118369. The reversal of 81593145118359 is 95381154139518.

81593145118359 is a `hidden beast` number, since 8 + 1 + 5 + 9 + 31 + 4 + 511 + 83 + 5 + 9 = 666.

It is not a de Polignac number, because 81593145118359 - 2¹² = 81593145114263 is a prime.

It is a super-2 number, since 2×81593145118359² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81593145118296 and 81593145118305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81593145118369) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3786916969 + ... + 3786938514.

It is an arithmetic number, because the mean of its divisors is an integer number (3665746054256).

Almost surely, 2^{81593145118359} is an apocalyptic number.

81593145118359 is a deficient number, since it is larger than the sum of its proper divisors (65036697051881).

81593145118359 is a wasteful number, since it uses less digits than its factorization.

81593145118359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7573855521 (or 7573855512 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 63.

The spelling of 81593145118359 in words is "eighty-one trillion, five hundred ninety-three billion, one hundred forty-five million, one hundred eighteen thousand, three hundred fifty-nine".