11551666032 has 60 divisors (see below), whose sum is σ = 33117140784. Its totient is φ = 3756637440.

The previous prime is 11551666001. The next prime is 11551666033. The reversal of 11551666032 is 23066615511.

It is a super-2 number, since 2×11551666032² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551666033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 972388 + ... + 984195.

Almost surely, 2^11551666032 is an apocalyptic number.

11551666032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11551666032 is an abundant number, since it is smaller than the sum of its proper divisors (21565474752).

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

11551666032 is a wasteful number, since it uses less digits than its factorization.

11551666032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956638 (or 1956629 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 11551666032 in words is "eleven billion, five hundred fifty-one million, six hundred sixty-six thousand, thirty-two".