81632088104 has 32 divisors (see below), whose sum is σ = 175190620800. Its totient is φ = 34932237120.

The previous prime is 81632088103. The next prime is 81632088119. The reversal of 81632088104 is 40188023618.

It is not an unprimeable number, because it can be changed into a prime (81632088101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065644 + ... + 1139675.

It is an arithmetic number, because the mean of its divisors is an integer number (5474706900).

Almost surely, 2^81632088104 is an apocalyptic number.

It is an amenable number.

81632088104 is an abundant number, since it is smaller than the sum of its proper divisors (93558532696).

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

81632088104 is a wasteful number, since it uses less digits than its factorization.

81632088104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205993 (or 2205989 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 81632088104 in words is "eighty-one billion, six hundred thirty-two million, eighty-eight thousand, one hundred four".