81341125087 has 8 divisors (see below), whose sum is σ = 82938741680. Its totient is φ = 79752029760.

The previous prime is 81341125069. The next prime is 81341125109. The reversal of 81341125087 is 78052114318.

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 81341125087 - 2⁷ = 81341124959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81341125027) 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, 2111037 + ... + 2149222.

It is an arithmetic number, because the mean of its divisors is an integer number (10367342710).

Almost surely, 2^81341125087 is an apocalyptic number.

81341125087 is a deficient number, since it is larger than the sum of its proper divisors (1597616593).

81341125087 is a wasteful number, since it uses less digits than its factorization.

81341125087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260633.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 81341125087 in words is "eighty-one billion, three hundred forty-one million, one hundred twenty-five thousand, eighty-seven".