81125062547 has 8 divisors (see below), whose sum is σ = 82086982656. Its totient is φ = 80165705472.

The previous prime is 81125062537. The next prime is 81125062553. The reversal of 81125062547 is 74526052118.

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

It is a cyclic number.

It is not a de Polignac number, because 81125062547 - 2¹⁶ = 81124997011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81125062507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577043 + ... + 703724.

It is an arithmetic number, because the mean of its divisors is an integer number (10260872832).

Almost surely, 2^81125062547 is an apocalyptic number.

81125062547 is a deficient number, since it is larger than the sum of its proper divisors (961920109).

81125062547 is a wasteful number, since it uses less digits than its factorization.

81125062547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281517.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 81125062547 in words is "eighty-one billion, one hundred twenty-five million, sixty-two thousand, five hundred forty-seven".