986941781855 has 4 divisors (see below), whose sum is σ = 1184330138232. Its totient is φ = 789553425480.

The previous prime is 986941781789. The next prime is 986941781879. The reversal of 986941781855 is 558187149689.

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

It is not a de Polignac number, because 986941781855 - 2¹⁰ = 986941780831 is a prime.

It is a super-2 number, since 2×986941781855² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98694178181 + ... + 98694178190.

It is an arithmetic number, because the mean of its divisors is an integer number (296082534558).

Almost surely, 2^986941781855 is an apocalyptic number.

986941781855 is a deficient number, since it is larger than the sum of its proper divisors (197388356377).

986941781855 is a wasteful number, since it uses less digits than its factorization.

986941781855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197388356376.

The product of its digits is 174182400, while the sum is 71.

The spelling of 986941781855 in words is "nine hundred eighty-six billion, nine hundred forty-one million, seven hundred eighty-one thousand, eight hundred fifty-five".