81504762 has 16 divisors (see below), whose sum is σ = 163480800. Its totient is φ = 27089712.

The previous prime is 81504743. The next prime is 81504767. The reversal of 81504762 is 26740518.

It is not an unprimeable number, because it can be changed into a prime (81504767) by changing a digit.

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, 17368 + ... + 21555.

It is an arithmetic number, because the mean of its divisors is an integer number (10217550).

Almost surely, 2^81504762 is an apocalyptic number.

81504762 is an abundant number, since it is smaller than the sum of its proper divisors (81976038).

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

81504762 is a wasteful number, since it uses less digits than its factorization.

81504762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39277.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 81504762 is about 9027.9987815684. The cubic root of 81504762 is about 433.5717671384.

The spelling of 81504762 in words is "eighty-one million, five hundred four thousand, seven hundred sixty-two".