68440815145 has 8 divisors (see below), whose sum is σ = 85699803456. Its totient is φ = 52372101936.

The previous prime is 68440815143. The next prime is 68440815227. The reversal of 68440815145 is 54151804486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68440815145 - 2¹ = 68440815143 is a prime.

It is a super-2 number, since 2×68440815145² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68440815095 and 68440815104.

It is not an unprimeable number, because it can be changed into a prime (68440815143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297568647 + ... + 297568876.

It is an arithmetic number, because the mean of its divisors is an integer number (10712475432).

Almost surely, 2^68440815145 is an apocalyptic number.

It is an amenable number.

68440815145 is a deficient number, since it is larger than the sum of its proper divisors (17258988311).

68440815145 is a wasteful number, since it uses less digits than its factorization.

68440815145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595137551.

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 68440815145 in words is "sixty-eight billion, four hundred forty million, eight hundred fifteen thousand, one hundred forty-five".