68145589940 has 12 divisors (see below), whose sum is σ = 143105738916. Its totient is φ = 27258235968.

The previous prime is 68145589913. The next prime is 68145589957. The reversal of 68145589940 is 4998554186.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15295258276 + 52850331664 = 123674^2 + 229892^2 .

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 68145589940.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1703639729 + ... + 1703639768.

It is an arithmetic number, because the mean of its divisors is an integer number (11925478243).

Almost surely, 2^68145589940 is an apocalyptic number.

It is an amenable number.

68145589940 is an abundant number, since it is smaller than the sum of its proper divisors (74960148976).

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

68145589940 is a wasteful number, since it uses less digits than its factorization.

68145589940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407279506 (or 3407279504 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 59.

The spelling of 68145589940 in words is "sixty-eight billion, one hundred forty-five million, five hundred eighty-nine thousand, nine hundred forty".