868537063620855 has 16 divisors (see below), whose sum is σ = 1544065890881760. Its totient is φ = 463219767264384.

The previous prime is 868537063620847. The next prime is 868537063620857. The reversal of 868537063620855 is 558026360735868.

It is a happy number.

868537063620855 is a `hidden beast` number, since 8 + 6 + 8 + 537 + 0 + 6 + 3 + 6 + 2 + 0 + 85 + 5 = 666.

It is not a de Polignac number, because 868537063620855 - 2³ = 868537063620847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868537063620857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3216803939202 + ... + 3216803939471.

It is an arithmetic number, because the mean of its divisors is an integer number (96504118180110).

Almost surely, 2^{868537063620855} is an apocalyptic number.

868537063620855 is a deficient number, since it is larger than the sum of its proper divisors (675528827260905).

868537063620855 is a wasteful number, since it uses less digits than its factorization.

868537063620855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6433607878687 (or 6433607878681 counting only the distinct ones).

The product of its (nonzero) digits is 1741824000, while the sum is 72.

The spelling of 868537063620855 in words is "eight hundred sixty-eight trillion, five hundred thirty-seven billion, sixty-three million, six hundred twenty thousand, eight hundred fifty-five".