81632750330 has 32 divisors (see below), whose sum is σ = 155672041536. Its totient is φ = 30714626304.

The previous prime is 81632750327. The next prime is 81632750341. The reversal of 81632750330 is 3305723618.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159557 + ... + 434423.

It is an arithmetic number, because the mean of its divisors is an integer number (4864751298).

Almost surely, 2^81632750330 is an apocalyptic number.

81632750330 is a deficient number, since it is larger than the sum of its proper divisors (74039291206).

81632750330 is a wasteful number, since it uses less digits than its factorization.

81632750330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276638.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 81632750330 in words is "eighty-one billion, six hundred thirty-two million, seven hundred fifty thousand, three hundred thirty".