81763150142280 has 128 divisors (see below), whose sum is σ = 251278766766720. Its totient is φ = 21272274186240.

The previous prime is 81763150142239. The next prime is 81763150142287. The reversal of 81763150142280 is 8224105136718.

It is not an unprimeable number, because it can be changed into a prime (81763150142287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4446987 + ... + 13538906.

It is an arithmetic number, because the mean of its divisors is an integer number (1963115365365).

Almost surely, 2^{81763150142280} is an apocalyptic number.

It is an amenable number.

81763150142280 is an abundant number, since it is smaller than the sum of its proper divisors (169515616624440).

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

81763150142280 is a wasteful number, since it uses less digits than its factorization.

81763150142280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17986831 (or 17986827 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

Adding to 81763150142280 its reverse (8224105136718), we get a palindrome (89987255278998).

The spelling of 81763150142280 in words is "eighty-one trillion, seven hundred sixty-three billion, one hundred fifty million, one hundred forty-two thousand, two hundred eighty".