81513852783080 has 32 divisors (see below), whose sum is σ = 183447263980800. Its totient is φ = 32598235296576.

The previous prime is 81513852783017. The next prime is 81513852783089. The reversal of 81513852783080 is 8038725831518.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81513852783089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228126020 + ... + 228483059.

It is an arithmetic number, because the mean of its divisors is an integer number (5732726999400).

Almost surely, 2^{81513852783080} is an apocalyptic number.

It is an amenable number.

81513852783080 is an abundant number, since it is smaller than the sum of its proper divisors (101933411197720).

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

81513852783080 is a wasteful number, since it uses less digits than its factorization.

81513852783080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456613553 (or 456613549 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 59.

The spelling of 81513852783080 in words is "eighty-one trillion, five hundred thirteen billion, eight hundred fifty-two million, seven hundred eighty-three thousand, eighty".