861982745411 has 4 divisors (see below), whose sum is σ = 880322803872. Its totient is φ = 843642686952.

The previous prime is 861982745401. The next prime is 861982745467. The reversal of 861982745411 is 114547289168.

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

It is a cyclic number.

It is not a de Polignac number, because 861982745411 - 2¹⁰ = 861982744387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861982745401) 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, 9170029160 + ... + 9170029253.

It is an arithmetic number, because the mean of its divisors is an integer number (220080700968).

Almost surely, 2^861982745411 is an apocalyptic number.

861982745411 is a deficient number, since it is larger than the sum of its proper divisors (18340058461).

861982745411 is a wasteful number, since it uses less digits than its factorization.

861982745411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18340058460.

The product of its digits is 3870720, while the sum is 56.

The spelling of 861982745411 in words is "eight hundred sixty-one billion, nine hundred eighty-two million, seven hundred forty-five thousand, four hundred eleven".