81732669414 has 32 divisors (see below), whose sum is σ = 181690470144. Its totient is φ = 24300163680.

The previous prime is 81732669409. The next prime is 81732669433. The reversal of 81732669414 is 41496623718.

It is a happy number.

It is a super-2 number, since 2×81732669414² (a number of 23 digits) contains 22 as substring.

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, 11679274 + ... + 11686269.

It is an arithmetic number, because the mean of its divisors is an integer number (5677827192).

Almost surely, 2^81732669414 is an apocalyptic number.

81732669414 is an abundant number, since it is smaller than the sum of its proper divisors (99957800730).

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

81732669414 is a wasteful number, since it uses less digits than its factorization.

81732669414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23365612.

The product of its digits is 1741824, while the sum is 51.

The spelling of 81732669414 in words is "eighty-one billion, seven hundred thirty-two million, six hundred sixty-nine thousand, four hundred fourteen".