11551436468 has 48 divisors (see below), whose sum is σ = 24254463744. Its totient is φ = 4743623040.

The previous prime is 11551436461. The next prime is 11551436509. The reversal of 11551436468 is 86463415511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551436461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187955 + ... + 241722.

It is an arithmetic number, because the mean of its divisors is an integer number (505301328).

Almost surely, 2^11551436468 is an apocalyptic number.

It is an amenable number.

11551436468 is an abundant number, since it is smaller than the sum of its proper divisors (12703027276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11551436468 is a wasteful number, since it uses less digits than its factorization.

11551436468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429752 (or 429750 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

It can be divided in two parts, 1155143 and 6468, that added together give a palindrome (1161611).

The spelling of 11551436468 in words is "eleven billion, five hundred fifty-one million, four hundred thirty-six thousand, four hundred sixty-eight".