68153686489 has 48 divisors (see below), whose sum is σ = 86425807680. Its totient is φ = 53406138240.

The previous prime is 68153686481. The next prime is 68153686501. The reversal of 68153686489 is 98468635186.

It is not a de Polignac number, because 68153686489 - 2³ = 68153686481 is a prime.

It is a super-2 number, since 2×68153686489² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68153686489.

It is not an unprimeable number, because it can be changed into a prime (68153686481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2998602 + ... + 3021244.

It is an arithmetic number, because the mean of its divisors is an integer number (1800537660).

Almost surely, 2^68153686489 is an apocalyptic number.

It is an amenable number.

68153686489 is a deficient number, since it is larger than the sum of its proper divisors (18272121191).

68153686489 is a wasteful number, since it uses less digits than its factorization.

68153686489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22790 (or 22783 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 64.

The spelling of 68153686489 in words is "sixty-eight billion, one hundred fifty-three million, six hundred eighty-six thousand, four hundred eighty-nine".