81353137880175 has 96 divisors (see below), whose sum is σ = 155273479194624. Its totient is φ = 36814003200000.

The previous prime is 81353137880171. The next prime is 81353137880239. The reversal of 81353137880175 is 57108873135318.

It is not a de Polignac number, because 81353137880175 - 2² = 81353137880171 is a prime.

It is a super-3 number, since 3×81353137880175³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81353137880171) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 254413242 + ... + 254732808.

It is an arithmetic number, because the mean of its divisors is an integer number (1617432074944).

Almost surely, 2^{81353137880175} is an apocalyptic number.

81353137880175 is a deficient number, since it is larger than the sum of its proper divisors (73920341314449).

81353137880175 is a wasteful number, since it uses less digits than its factorization.

81353137880175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324489 (or 324484 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 60.

The spelling of 81353137880175 in words is "eighty-one trillion, three hundred fifty-three billion, one hundred thirty-seven million, eight hundred eighty thousand, one hundred seventy-five".