11487641888 has 18 divisors (see below), whose sum is σ = 22617488691. Its totient is φ = 5743517792.

The previous prime is 11487641887. The next prime is 11487641947. The reversal of 11487641888 is 88814678411.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 5743820944 + 5743820944 = 75788^2 + 75788^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=75788.

It is a super-2 number, since 2×11487641888² (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 (11487641887) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 596831 + ... + 615777.

Almost surely, 2^11487641888 is an apocalyptic number.

It is an amenable number.

11487641888 is a deficient number, since it is larger than the sum of its proper divisors (11129846803).

11487641888 is an frugal number, since it uses more digits than its factorization.

11487641888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37904 (or 18949 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 56.

The spelling of 11487641888 in words is "eleven billion, four hundred eighty-seven million, six hundred forty-one thousand, eight hundred eighty-eight".