68450740002 has 18 divisors (see below), whose sum is σ = 148312341723. Its totient is φ = 22816543332.

The previous prime is 68450739961. The next prime is 68450740003. The reversal of 68450740002 is 20004705486.

It can be written as a sum of positive squares in only one way, i.e., 34225370001 + 34225370001 = 185001^2 + 185001^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=185001.

It is not an unprimeable number, because it can be changed into a prime (68450740003) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1079173 + ... + 1140839.

Almost surely, 2^68450740002 is an apocalyptic number.

68450740002 is an abundant number, since it is smaller than the sum of its proper divisors (79861601721).

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

68450740002 is an frugal number, since it uses more digits than its factorization.

68450740002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123342 (or 61672 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 68450740002 in words is "sixty-eight billion, four hundred fifty million, seven hundred forty thousand, two".