86442045781 has 16 divisors (see below), whose sum is σ = 106446388608. Its totient is φ = 68357592000.

The previous prime is 86442045743. The next prime is 86442045793. The reversal of 86442045781 is 18754024468.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 86442045781 - 2¹¹ = 86442043733 is a prime.

It is a super-2 number, since 2×86442045781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86442445781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76855 + ... + 422836.

It is an arithmetic number, because the mean of its divisors is an integer number (6652899288).

Almost surely, 2^86442045781 is an apocalyptic number.

It is an amenable number.

86442045781 is a deficient number, since it is larger than the sum of its proper divisors (20004342827).

86442045781 is a wasteful number, since it uses less digits than its factorization.

86442045781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501612.

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 86442045781 in words is "eighty-six billion, four hundred forty-two million, forty-five thousand, seven hundred eighty-one".