16651163232 has 72 divisors (see below), whose sum is σ = 51656459400. Its totient is φ = 5045806080.

The previous prime is 16651163231. The next prime is 16651163233. The reversal of 16651163232 is 23236115661.

16651163232 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 11 + 632 + 3 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (16651163231) and next prime (16651163233).

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×16651163232² (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 (16651163231) 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, 2624857 + ... + 2631192.

It is an arithmetic number, because the mean of its divisors is an integer number (717450825).

Almost surely, 2^16651163232 is an apocalyptic number.

16651163232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16651163232 is an abundant number, since it is smaller than the sum of its proper divisors (35005296168).

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

16651163232 is a wasteful number, since it uses less digits than its factorization.

16651163232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256076 (or 5256065 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

Adding to 16651163232 its reverse (23236115661), we get a palindrome (39887278893).

The spelling of 16651163232 in words is "sixteen billion, six hundred fifty-one million, one hundred sixty-three thousand, two hundred thirty-two".