81593145118360 has 128 divisors (see below), whose sum is σ = 187989433329600. Its totient is φ = 31860695992320.

The previous prime is 81593145118301. The next prime is 81593145118369. The reversal of 81593145118360 is 6381154139518.

It is a super-4 number, since 4×81593145118360⁴ (a number of 57 digits) contains 4444 as substring.

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 31 ways as a sum of consecutive naturals, for example, 416255175 + ... + 416451145.

Almost surely, 2^{81593145118360} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81593145118360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93994716664800).

81593145118360 is an abundant number, since it is smaller than the sum of its proper divisors (106396288211240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81593145118360 is a wasteful number, since it uses less digits than its factorization.

81593145118360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197021 (or 197017 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 81593145118360 in words is "eighty-one trillion, five hundred ninety-three billion, one hundred forty-five million, one hundred eighteen thousand, three hundred sixty".