72069878409 has 16 divisors (see below), whose sum is σ = 100890419520. Its totient is φ = 45697417920.

The previous prime is 72069878381. The next prime is 72069878411. The reversal of 72069878409 is 90487896027.

It is not a de Polignac number, because 72069878409 - 2⁷ = 72069878281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72069878429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6176182 + ... + 6187839.

It is an arithmetic number, because the mean of its divisors is an integer number (6305651220).

Almost surely, 2^72069878409 is an apocalyptic number.

It is an amenable number.

72069878409 is a deficient number, since it is larger than the sum of its proper divisors (28820541111).

72069878409 is a wasteful number, since it uses less digits than its factorization.

72069878409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12364120.

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 72069878409 in words is "seventy-two billion, sixty-nine million, eight hundred seventy-eight thousand, four hundred nine".