68455187888 has 20 divisors (see below), whose sum is σ = 132656741568. Its totient is φ = 34221190080.

The previous prime is 68455187887. The next prime is 68455187897. The reversal of 68455187888 is 88878155486.

It is a super-2 number, since 2×68455187888² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68455187887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311456 + ... + 483647.

Almost surely, 2^68455187888 is an apocalyptic number.

It is an amenable number.

68455187888 is a deficient number, since it is larger than the sum of its proper divisors (64201553680).

68455187888 is a wasteful number, since it uses less digits than its factorization.

68455187888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800492 (or 800486 counting only the distinct ones).

The product of its digits is 137625600, while the sum is 68.

The spelling of 68455187888 in words is "sixty-eight billion, four hundred fifty-five million, one hundred eighty-seven thousand, eight hundred eighty-eight".