68091167440 has 20 divisors (see below), whose sum is σ = 158311964484. Its totient is φ = 27236466944.

The previous prime is 68091167437. The next prime is 68091167461. The reversal of 68091167440 is 4476119086.

68091167440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11048532544 + 57042634896 = 105112^2 + 238836^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425569717 + ... + 425569876.

Almost surely, 2^68091167440 is an apocalyptic number.

It is an amenable number.

68091167440 is an abundant number, since it is smaller than the sum of its proper divisors (90220797044).

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

68091167440 is a wasteful number, since it uses less digits than its factorization.

68091167440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851139606 (or 851139600 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 68091167440 in words is "sixty-eight billion, ninety-one million, one hundred sixty-seven thousand, four hundred forty".