81755010132 has 48 divisors (see below), whose sum is σ = 192833414592. Its totient is φ = 26956016640.

The previous prime is 81755010101. The next prime is 81755010221. The reversal of 81755010132 is 23101055718.

It is a junction number, because it is equal to n+sod(n) for n = 81755010093 and 81755010102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2229498 + ... + 2265870.

It is an arithmetic number, because the mean of its divisors is an integer number (4017362804).

Almost surely, 2^81755010132 is an apocalyptic number.

It is an amenable number.

81755010132 is an abundant number, since it is smaller than the sum of its proper divisors (111078404460).

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

81755010132 is a wasteful number, since it uses less digits than its factorization.

81755010132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38408 (or 38406 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 33.

The spelling of 81755010132 in words is "eighty-one billion, seven hundred fifty-five million, ten thousand, one hundred thirty-two".