11385313515 has 12 divisors (see below), whose sum is σ = 19734543504. Its totient is φ = 6072167184.

The previous prime is 11385313507. The next prime is 11385313543. The reversal of 11385313515 is 51531358311.

11385313515 is a `hidden beast` number, since 1 + 138 + 5 + 3 + 1 + 3 + 515 = 666.

It is not a de Polignac number, because 11385313515 - 2³ = 11385313507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11385313515.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126503439 + ... + 126503528.

It is an arithmetic number, because the mean of its divisors is an integer number (1644545292).

Almost surely, 2^11385313515 is an apocalyptic number.

11385313515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11385313515 is a deficient number, since it is larger than the sum of its proper divisors (8349229989).

11385313515 is a wasteful number, since it uses less digits than its factorization.

11385313515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253006978 (or 253006975 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

It can be divided in two parts, 11385 and 313515, that added together give a square (324900 = 570²).

The spelling of 11385313515 in words is "eleven billion, three hundred eighty-five million, three hundred thirteen thousand, five hundred fifteen".