81125602134 has 8 divisors (see below), whose sum is σ = 162251204280. Its totient is φ = 27041867376.

The previous prime is 81125602121. The next prime is 81125602171. The reversal of 81125602134 is 43120652118.

It is a sphenic number, since it is the product of 3 distinct primes.

81125602134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 81125602095 and 81125602104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6760466839 + ... + 6760466850.

It is an arithmetic number, because the mean of its divisors is an integer number (20281400535).

Almost surely, 2^81125602134 is an apocalyptic number.

81125602134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81125602134 is a wasteful number, since it uses less digits than its factorization.

81125602134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13520933694.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 81125602134 in words is "eighty-one billion, one hundred twenty-five million, six hundred two thousand, one hundred thirty-four".