68458132581 has 8 divisors (see below), whose sum is σ = 95246097600. Its totient is φ = 43654461312.

The previous prime is 68458132573. The next prime is 68458132651. The reversal of 68458132581 is 18523185486.

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

It is not a de Polignac number, because 68458132581 - 2³ = 68458132573 is a prime.

It is a super-2 number, since 2×68458132581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68458132681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496073356 + ... + 496073493.

It is an arithmetic number, because the mean of its divisors is an integer number (11905762200).

Almost surely, 2^68458132581 is an apocalyptic number.

It is an amenable number.

68458132581 is a deficient number, since it is larger than the sum of its proper divisors (26787965019).

68458132581 is a wasteful number, since it uses less digits than its factorization.

68458132581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992146875.

The product of its digits is 1843200, while the sum is 51.

The spelling of 68458132581 in words is "sixty-eight billion, four hundred fifty-eight million, one hundred thirty-two thousand, five hundred eighty-one".