81558453700908 has 96 divisors (see below), whose sum is σ = 211669275417600. Its totient is φ = 27157694655168.

The previous prime is 81558453700859. The next prime is 81558453700937. The reversal of 81558453700908 is 80900735485518.

81558453700908 is a `hidden beast` number, since 8 + 1 + 5 + 5 + 8 + 4 + 537 + 0 + 0 + 90 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451639491 + ... + 451820037.

It is an arithmetic number, because the mean of its divisors is an integer number (2204888285600).

Almost surely, 2^{81558453700908} is an apocalyptic number.

It is an amenable number.

81558453700908 is an abundant number, since it is smaller than the sum of its proper divisors (130110821716692).

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

81558453700908 is a wasteful number, since it uses less digits than its factorization.

81558453700908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184916 (or 184908 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 63.

The spelling of 81558453700908 in words is "eighty-one trillion, five hundred fifty-eight billion, four hundred fifty-three million, seven hundred thousand, nine hundred eight".