11519424891 has 96 divisors (see below), whose sum is σ = 18718801920. Its totient is φ = 6782227200.

The previous prime is 11519424853. The next prime is 11519424947. The reversal of 11519424891 is 19842491511.

It is a happy number.

11519424891 is a `hidden beast` number, since 1 + 1 + 519 + 4 + 2 + 48 + 91 = 666.

It is not a de Polignac number, because 11519424891 - 2¹¹ = 11519422843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11519424991) 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, 64354240 + ... + 64354418.

It is an arithmetic number, because the mean of its divisors is an integer number (194987520).

Almost surely, 2^11519424891 is an apocalyptic number.

11519424891 is a deficient number, since it is larger than the sum of its proper divisors (7199377029).

11519424891 is a wasteful number, since it uses less digits than its factorization.

11519424891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 454 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The spelling of 11519424891 in words is "eleven billion, five hundred nineteen million, four hundred twenty-four thousand, eight hundred ninety-one".