84010941781 has 4 divisors (see below), whose sum is σ = 90473321932. Its totient is φ = 77548561632.

The previous prime is 84010941739. The next prime is 84010941793. The reversal of 84010941781 is 18714901048.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4672952881 + 79337988900 = 68359^2 + 281670^2 .

It is a cyclic number.

It is not a de Polignac number, because 84010941781 - 2⁹ = 84010941269 is a prime.

It is a super-2 number, since 2×84010941781² (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 (84010941731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3231190056 + ... + 3231190081.

It is an arithmetic number, because the mean of its divisors is an integer number (22618330483).

Almost surely, 2^84010941781 is an apocalyptic number.

It is an amenable number.

84010941781 is a deficient number, since it is larger than the sum of its proper divisors (6462380151).

84010941781 is a wasteful number, since it uses less digits than its factorization.

84010941781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6462380150.

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 84010941781 in words is "eighty-four billion, ten million, nine hundred forty-one thousand, seven hundred eighty-one".