11565403487 has 12 divisors (see below), whose sum is σ = 12747073248. Its totient is φ = 10485314400.

The previous prime is 11565403469. The next prime is 11565403511. The reversal of 11565403487 is 78430456511.

It is not a de Polignac number, because 11565403487 - 2⁸ = 11565403231 is a prime.

It is a super-2 number, since 2×11565403487² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11565403457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85814 + ... + 174627.

It is an arithmetic number, because the mean of its divisors is an integer number (1062256104).

Almost surely, 2^11565403487 is an apocalyptic number.

11565403487 is a deficient number, since it is larger than the sum of its proper divisors (1181669761).

11565403487 is a wasteful number, since it uses less digits than its factorization.

11565403487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260830 (or 260819 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

Adding to 11565403487 its reverse (78430456511), we get a palindrome (89995859998).

The spelling of 11565403487 in words is "eleven billion, five hundred sixty-five million, four hundred three thousand, four hundred eighty-seven".