11997456417 has 6 divisors (see below), whose sum is σ = 17329659282. Its totient is φ = 7998304272.

The previous prime is 11997456403. The next prime is 11997456431. The reversal of 11997456417 is 71465479911.

It is a happy number.

11997456417 is a `hidden beast` number, since 1 + 1 + 9 + 9 + 74 + 564 + 1 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (11997456403) and next prime (11997456431).

It can be written as a sum of positive squares in only one way, i.e., 11388304656 + 609151761 = 106716^2 + 24681^2 .

It is not a de Polignac number, because 11997456417 - 2⁸ = 11997456161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11997456217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666525348 + ... + 666525365.

It is an arithmetic number, because the mean of its divisors is an integer number (2888276547).

Almost surely, 2^11997456417 is an apocalyptic number.

It is an amenable number.

11997456417 is a deficient number, since it is larger than the sum of its proper divisors (5332202865).

11997456417 is a wasteful number, since it uses less digits than its factorization.

11997456417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333050719 (or 1333050716 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The spelling of 11997456417 in words is "eleven billion, nine hundred ninety-seven million, four hundred fifty-six thousand, four hundred seventeen".