81407480673332 has 48 divisors (see below), whose sum is σ = 156955362971904. Its totient is φ = 36636486960000.

The previous prime is 81407480673307. The next prime is 81407480673397. The reversal of 81407480673332 is 23337608470418.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556053413 + ... + 556199795.

It is an arithmetic number, because the mean of its divisors is an integer number (3269903395248).

Almost surely, 2^{81407480673332} is an apocalyptic number.

It is an amenable number.

81407480673332 is a deficient number, since it is larger than the sum of its proper divisors (75547882298572).

81407480673332 is a wasteful number, since it uses less digits than its factorization.

81407480673332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271640 (or 271638 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 81407480673332 in words is "eighty-one trillion, four hundred seven billion, four hundred eighty million, six hundred seventy-three thousand, three hundred thirty-two".