11899697519 has 8 divisors (see below), whose sum is σ = 13147492320. Its totient is φ = 10712770816.

The previous prime is 11899697507. The next prime is 11899697527. The reversal of 11899697519 is 91579699811.

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 11899697519 - 2⁸ = 11899697263 is a prime.

It is a super-2 number, since 2×11899697519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11899697599) 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, 15216614 + ... + 15217395.

It is an arithmetic number, because the mean of its divisors is an integer number (1643436540).

Almost surely, 2^11899697519 is an apocalyptic number.

11899697519 is a deficient number, since it is larger than the sum of its proper divisors (1247794801).

11899697519 is a wasteful number, since it uses less digits than its factorization.

11899697519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30434049.

The product of its digits is 11022480, while the sum is 65.

The spelling of 11899697519 in words is "eleven billion, eight hundred ninety-nine million, six hundred ninety-seven thousand, five hundred nineteen".