72868142709 has 12 divisors (see below), whose sum is σ = 105256355776. Its totient is φ = 48577667112.

The previous prime is 72868142647. The next prime is 72868142713. The reversal of 72868142709 is 90724186827.

It is a happy number.

It is not a de Polignac number, because 72868142709 - 2⁸ = 72868142453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72868142759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 632742 + ... + 738984.

Almost surely, 2^72868142709 is an apocalyptic number.

It is an amenable number.

72868142709 is a deficient number, since it is larger than the sum of its proper divisors (32388213067).

72868142709 is a wasteful number, since it uses less digits than its factorization.

72868142709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182456 (or 182453 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 72868142709 in words is "seventy-two billion, eight hundred sixty-eight million, one hundred forty-two thousand, seven hundred nine".