81119741530 has 16 divisors (see below), whose sum is σ = 147656160360. Its totient is φ = 32083313152.

The previous prime is 81119741497. The next prime is 81119741561. The reversal of 81119741530 is 3514791118.

It can be written as a sum of positive squares in 4 ways, for example, as 67242194721 + 13877546809 = 259311^2 + 117803^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45571999 + ... + 45573778.

Almost surely, 2^81119741530 is an apocalyptic number.

81119741530 is a deficient number, since it is larger than the sum of its proper divisors (66536418830).

81119741530 is a wasteful number, since it uses less digits than its factorization.

81119741530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91145873.

The product of its (nonzero) digits is 30240, while the sum is 40.

It can be divided in two parts, 81119 and 741530, that added together give a square (822649 = 907²).

The spelling of 81119741530 in words is "eighty-one billion, one hundred nineteen million, seven hundred forty-one thousand, five hundred thirty".