11551419438 has 16 divisors (see below), whose sum is σ = 24879980496. Its totient is φ = 3554282880.

The previous prime is 11551419413. The next prime is 11551419511. The reversal of 11551419438 is 83491415511.

It is a self number, because there is not a number n which added to its sum of digits gives 11551419438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74047483 + ... + 74047638.

It is an arithmetic number, because the mean of its divisors is an integer number (1554998781).

Almost surely, 2^11551419438 is an apocalyptic number.

11551419438 is an abundant number, since it is smaller than the sum of its proper divisors (13328561058).

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

11551419438 is a wasteful number, since it uses less digits than its factorization.

11551419438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148095139.

The product of its digits is 86400, while the sum is 42.

The spelling of 11551419438 in words is "eleven billion, five hundred fifty-one million, four hundred nineteen thousand, four hundred thirty-eight".