11900518517 has 8 divisors (see below), whose sum is σ = 12680810136. Its totient is φ = 11129144832.

The previous prime is 11900518507. The next prime is 11900518519. The reversal of 11900518517 is 71581500911.

It can be written as a sum of positive squares in 4 ways, for example, as 5745488401 + 6155030116 = 75799^2 + 78454^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11900518517 - 2⁶ = 11900518453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11900518519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2226728 + ... + 2232065.

It is an arithmetic number, because the mean of its divisors is an integer number (1585101267).

Almost surely, 2^11900518517 is an apocalyptic number.

11900518517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11900518517 is a deficient number, since it is larger than the sum of its proper divisors (780291619).

11900518517 is a wasteful number, since it uses less digits than its factorization.

11900518517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458967.

The product of its (nonzero) digits is 12600, while the sum is 38.

The spelling of 11900518517 in words is "eleven billion, nine hundred million, five hundred eighteen thousand, five hundred seventeen".