8444351861 has 4 divisors (see below), whose sum is σ = 9212020224. Its totient is φ = 7676683500.

The previous prime is 8444351819. The next prime is 8444351873. The reversal of 8444351861 is 1681534448.

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 8444351861 - 2¹⁴ = 8444335477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8444354861) 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, 383834165 + ... + 383834186.

It is an arithmetic number, because the mean of its divisors is an integer number (2303005056).

Almost surely, 2^8444351861 is an apocalyptic number.

It is an amenable number.

8444351861 is a deficient number, since it is larger than the sum of its proper divisors (767668363).

8444351861 is a wasteful number, since it uses less digits than its factorization.

8444351861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767668362.

The product of its digits is 368640, while the sum is 44.

The square root of 8444351861 is about 91893.1545927116. The cubic root of 8444351861 is about 2036.3641392594.

The spelling of 8444351861 in words is "eight billion, four hundred forty-four million, three hundred fifty-one thousand, eight hundred sixty-one".