68443418553 has 16 divisors (see below), whose sum is σ = 96480436800. Its totient is φ = 43038648000.

The previous prime is 68443418543. The next prime is 68443418557. The reversal of 68443418553 is 35581434486.

It is not a de Polignac number, because 68443418553 - 2⁵ = 68443418521 is a prime.

It is a super-2 number, since 2×68443418553² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68443418496 and 68443418505.

It is not an unprimeable number, because it can be changed into a prime (68443418557) 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, 2608698 + ... + 2634803.

It is an arithmetic number, because the mean of its divisors is an integer number (6030027300).

Almost surely, 2^68443418553 is an apocalyptic number.

It is an amenable number.

68443418553 is a deficient number, since it is larger than the sum of its proper divisors (28037018247).

68443418553 is a wasteful number, since it uses less digits than its factorization.

68443418553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243752.

The product of its digits is 5529600, while the sum is 51.

The spelling of 68443418553 in words is "sixty-eight billion, four hundred forty-three million, four hundred eighteen thousand, five hundred fifty-three".