84073440781 has 8 divisors (see below), whose sum is σ = 91723163328. Its totient is φ = 76424832000.

The previous prime is 84073440779. The next prime is 84073440851. The reversal of 84073440781 is 18704437048.

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

It is not a de Polignac number, because 84073440781 - 2¹ = 84073440779 is a prime.

It is a super-2 number, since 2×84073440781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84073444781) 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, 116505 + ... + 426286.

It is an arithmetic number, because the mean of its divisors is an integer number (11465395416).

Almost surely, 2^84073440781 is an apocalyptic number.

It is an amenable number.

84073440781 is a deficient number, since it is larger than the sum of its proper divisors (7649722547).

84073440781 is a wasteful number, since it uses less digits than its factorization.

84073440781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556883.

The product of its (nonzero) digits is 602112, while the sum is 46.

The spelling of 84073440781 in words is "eighty-four billion, seventy-three million, four hundred forty thousand, seven hundred eighty-one".