81586146039 has 8 divisors (see below), whose sum is σ = 108951236592. Its totient is φ = 54305909760.

The previous prime is 81586146007. The next prime is 81586146101. The reversal of 81586146039 is 93064168518.

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

It is not a de Polignac number, because 81586146039 - 2⁵ = 81586146007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81586145982 and 81586146000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81586146539) 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, 21211324 + ... + 21215169.

It is an arithmetic number, because the mean of its divisors is an integer number (13618904574).

Almost surely, 2^81586146039 is an apocalyptic number.

81586146039 is a deficient number, since it is larger than the sum of its proper divisors (27365090553).

81586146039 is a wasteful number, since it uses less digits than its factorization.

81586146039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42427137.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 81586146039 in words is "eighty-one billion, five hundred eighty-six million, one hundred forty-six thousand, thirty-nine".