868388999958 has 32 divisors (see below), whose sum is σ = 1929788356320. Its totient is φ = 289457746560.

The previous prime is 868388999957. The next prime is 868388999963. The reversal of 868388999958 is 859999883868.

868388999958 is a `hidden beast` number, since 8 + 6 + 8 + 388 + 99 + 99 + 58 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868388999957) 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, 3871866 + ... + 4090002.

It is an arithmetic number, because the mean of its divisors is an integer number (60305886135).

Almost surely, 2^868388999958 is an apocalyptic number.

868388999958 is an abundant number, since it is smaller than the sum of its proper divisors (1061399356362).

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

868388999958 is a wasteful number, since it uses less digits than its factorization.

868388999958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291869 (or 291863 counting only the distinct ones).

The product of its digits is 19349176320, while the sum is 90.

The spelling of 868388999958 in words is "eight hundred sixty-eight billion, three hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred fifty-eight".