11551787427 has 8 divisors (see below), whose sum is σ = 15818664016. Its totient is φ = 7493051232.

The previous prime is 11551787381. The next prime is 11551787431. The reversal of 11551787427 is 72478715511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11551787427 - 2¹⁵ = 11551754659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11551787477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52034968 + ... + 52035189.

It is an arithmetic number, because the mean of its divisors is an integer number (1977333002).

Almost surely, 2^11551787427 is an apocalyptic number.

11551787427 is a deficient number, since it is larger than the sum of its proper divisors (4266876589).

11551787427 is a wasteful number, since it uses less digits than its factorization.

11551787427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104070197.

The product of its digits is 548800, while the sum is 48.

The spelling of 11551787427 in words is "eleven billion, five hundred fifty-one million, seven hundred eighty-seven thousand, four hundred twenty-seven".