9860678643781 has 6 divisors (see below), whose sum is σ = 11470585361190. Its totient is φ = 8452010266056.

The previous prime is 9860678643779. The next prime is 9860678643787. The reversal of 9860678643781 is 1873468760689.

It can be written as a sum of positive squares in only one way, i.e., 8945088015556 + 915590628225 = 2990834^2 + 956865^2 .

It is not a de Polignac number, because 9860678643781 - 2¹ = 9860678643779 is a prime.

It is a super-2 number, since 2×9860678643781² (a number of 27 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 (9860678643787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100619169786 + ... + 100619169883.

It is an arithmetic number, because the mean of its divisors is an integer number (1911764226865).

Almost surely, 2^{9860678643781} is an apocalyptic number.

It is an amenable number.

9860678643781 is a deficient number, since it is larger than the sum of its proper divisors (1609906717409).

9860678643781 is a wasteful number, since it uses less digits than its factorization.

9860678643781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201238339683 (or 201238339676 counting only the distinct ones).

The product of its (nonzero) digits is 585252864, while the sum is 73.

The spelling of 9860678643781 in words is "nine trillion, eight hundred sixty billion, six hundred seventy-eight million, six hundred forty-three thousand, seven hundred eighty-one".