11515699387 has 2 divisors, whose sum is σ = 11515699388. Its totient is φ = 11515699386.

The previous prime is 11515699381. The next prime is 11515699441. The reversal of 11515699387 is 78399651511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11515699387 - 2¹⁵ = 11515666619 is a prime.

It is a super-2 number, since 2×11515699387² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11515699381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757849693 + 5757849694.

It is an arithmetic number, because the mean of its divisors is an integer number (5757849694).

Almost surely, 2^11515699387 is an apocalyptic number.

11515699387 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515699387 is an equidigital number, since it uses as much as digits as its factorization.

11515699387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 55.

The spelling of 11515699387 in words is "eleven billion, five hundred fifteen million, six hundred ninety-nine thousand, three hundred eighty-seven".