8261887016568 has 32 divisors (see below), whose sum is σ = 20654797080960. Its totient is φ = 2753951733600.

The previous prime is 8261887016561. The next prime is 8261887016629. The reversal of 8261887016568 is 8656107881628.

It is a junction number, because it is equal to n+sod(n) for n = 8261887016499 and 8261887016508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8261887016561) 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, 8021221 + ... + 8992427.

It is an arithmetic number, because the mean of its divisors is an integer number (645462408780).

Almost surely, 2^{8261887016568} is an apocalyptic number.

It is an amenable number.

8261887016568 is an abundant number, since it is smaller than the sum of its proper divisors (12392910064392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8261887016568 is a wasteful number, since it uses less digits than its factorization.

8261887016568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325667 (or 1325663 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 66.

The spelling of 8261887016568 in words is "eight trillion, two hundred sixty-one billion, eight hundred eighty-seven million, sixteen thousand, five hundred sixty-eight".