11515056619 has 4 divisors (see below), whose sum is σ = 12561879960. Its totient is φ = 10468233280.

The previous prime is 11515056617. The next prime is 11515056629. The reversal of 11515056619 is 91665051511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11515056619 - 2¹ = 11515056617 is a prime.

It is a super-2 number, since 2×11515056619² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11515056611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523411654 + ... + 523411675.

It is an arithmetic number, because the mean of its divisors is an integer number (3140469990).

Almost surely, 2^11515056619 is an apocalyptic number.

11515056619 is a deficient number, since it is larger than the sum of its proper divisors (1046823341).

11515056619 is a wasteful number, since it uses less digits than its factorization.

11515056619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046823340.

The product of its (nonzero) digits is 40500, while the sum is 40.

The spelling of 11515056619 in words is "eleven billion, five hundred fifteen million, fifty-six thousand, six hundred nineteen".