11801573217 has 96 divisors (see below), whose sum is σ = 20846592000. Its totient is φ = 6418687968.

The previous prime is 11801573197. The next prime is 11801573261. The reversal of 11801573217 is 71237510811.

11801573217 is a `hidden beast` number, since 1 + 1 + 80 + 1 + 573 + 2 + 1 + 7 = 666.

It is not a de Polignac number, because 11801573217 - 2⁶ = 11801573153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11801573717) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25489128 + ... + 25489590.

It is an arithmetic number, because the mean of its divisors is an integer number (217152000).

Almost surely, 2^11801573217 is an apocalyptic number.

It is an amenable number.

11801573217 is a deficient number, since it is larger than the sum of its proper divisors (9045018783).

11801573217 is a wasteful number, since it uses less digits than its factorization.

11801573217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 36.

The spelling of 11801573217 in words is "eleven billion, eight hundred one million, five hundred seventy-three thousand, two hundred seventeen".