11551671552 has 36 divisors (see below), whose sum is σ = 30744294560. Its totient is φ = 3850556928.

The previous prime is 11551671541. The next prime is 11551671559. The reversal of 11551671552 is 25517615511.

It is a happy number.

It is a super-2 number, since 2×11551671552² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11551671552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551671559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7519852 + ... + 7521387.

Almost surely, 2^11551671552 is an apocalyptic number.

11551671552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11551671552 is an abundant number, since it is smaller than the sum of its proper divisors (19192623008).

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

11551671552 is an equidigital number, since it uses as much as digits as its factorization.

11551671552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15041258 (or 15041244 counting only the distinct ones).

The product of its digits is 52500, while the sum is 39.

The spelling of 11551671552 in words is "eleven billion, five hundred fifty-one million, six hundred seventy-one thousand, five hundred fifty-two".