8380041781 has 4 divisors (see below), whose sum is σ = 8380241632. Its totient is φ = 8379841932.

The previous prime is 8380041773. The next prime is 8380041793. The reversal of 8380041781 is 1871400838.

8380041781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8380041781 - 2³ = 8380041773 is a prime.

It is a super-2 number, since 2×8380041781² (a number of 21 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 (8380041731) 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, 10131 + ... + 129856.

It is an arithmetic number, because the mean of its divisors is an integer number (2095060408).

Almost surely, 2^8380041781 is an apocalyptic number.

It is an amenable number.

8380041781 is a deficient number, since it is larger than the sum of its proper divisors (199851).

8380041781 is a wasteful number, since it uses less digits than its factorization.

8380041781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199850.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 8380041781 is about 91542.5681363594. The cubic root of 8380041781 is about 2031.1814796408.

The spelling of 8380041781 in words is "eight billion, three hundred eighty million, forty-one thousand, seven hundred eighty-one".