81527267351080 has 32 divisors (see below), whose sum is σ = 183440040739200. Its totient is φ = 32610251082816.

The previous prime is 81527267351053. The next prime is 81527267351081. The reversal of 81527267351080 is 8015376272518.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81527267351081) 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, 18479340 + ... + 22461979.

It is an arithmetic number, because the mean of its divisors is an integer number (5732501273100).

Almost surely, 2^{81527267351080} is an apocalyptic number.

It is an amenable number.

81527267351080 is an abundant number, since it is smaller than the sum of its proper divisors (101912773388120).

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

81527267351080 is a wasteful number, since it uses less digits than its factorization.

81527267351080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40991113 (or 40991109 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 81527267351080 in words is "eighty-one trillion, five hundred twenty-seven billion, two hundred sixty-seven million, three hundred fifty-one thousand, eighty".