81125062548 has 12 divisors (see below), whose sum is σ = 189291812640. Its totient is φ = 27041687512.

The previous prime is 81125062537. The next prime is 81125062553. The reversal of 81125062548 is 84526052118.

It is a tau number, because it is divible by the number of its divisors (12).

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, 3380210928 + ... + 3380210951.

It is an arithmetic number, because the mean of its divisors is an integer number (15774317720).

Almost surely, 2^81125062548 is an apocalyptic number.

It is an amenable number.

81125062548 is an abundant number, since it is smaller than the sum of its proper divisors (108166750092).

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

81125062548 is a wasteful number, since it uses less digits than its factorization.

81125062548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6760421886 (or 6760421884 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The spelling of 81125062548 in words is "eighty-one billion, one hundred twenty-five million, sixty-two thousand, five hundred forty-eight".