81582532214 has 32 divisors (see below), whose sum is σ = 132479089920. Its totient is φ = 37563514912.

The previous prime is 81582532181. The next prime is 81582532223. The reversal of 81582532214 is 41223528518.

It is a congruent number.

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, 374777 + ... + 551019.

It is an arithmetic number, because the mean of its divisors is an integer number (4139971560).

Almost surely, 2^81582532214 is an apocalyptic number.

81582532214 is a deficient number, since it is larger than the sum of its proper divisors (50896557706).

81582532214 is a wasteful number, since it uses less digits than its factorization.

81582532214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176644.

The product of its digits is 153600, while the sum is 41.

The spelling of 81582532214 in words is "eighty-one billion, five hundred eighty-two million, five hundred thirty-two thousand, two hundred fourteen".