986941781878 has 16 divisors (see below), whose sum is σ = 1688072369760. Its totient is φ = 428716791936.

The previous prime is 986941781789. The next prime is 986941781879. The reversal of 986941781878 is 878187149689.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986941781879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116449538 + ... + 1116450421.

It is an arithmetic number, because the mean of its divisors is an integer number (105504523110).

Almost surely, 2^986941781878 is an apocalyptic number.

986941781878 is a deficient number, since it is larger than the sum of its proper divisors (701130587882).

986941781878 is a wasteful number, since it uses less digits than its factorization.

986941781878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232899991.

The product of its digits is 390168576, while the sum is 76.

The spelling of 986941781878 in words is "nine hundred eighty-six billion, nine hundred forty-one million, seven hundred eighty-one thousand, eight hundred seventy-eight".