11487215393 has 4 divisors (see below), whose sum is σ = 11487980868. Its totient is φ = 11486449920.

The previous prime is 11487215387. The next prime is 11487215413. The reversal of 11487215393 is 39351278411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5226133264 + 6261082129 = 72292^2 + 79127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11487215393 is a prime.

It is a super-2 number, since 2×11487215393² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11487215353) 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, 359768 + ... + 390393.

It is an arithmetic number, because the mean of its divisors is an integer number (2871995217).

Almost surely, 2^11487215393 is an apocalyptic number.

It is an amenable number.

11487215393 is a deficient number, since it is larger than the sum of its proper divisors (765475).

11487215393 is an equidigital number, since it uses as much as digits as its factorization.

11487215393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765474.

The product of its digits is 181440, while the sum is 44.

The spelling of 11487215393 in words is "eleven billion, four hundred eighty-seven million, two hundred fifteen thousand, three hundred ninety-three".