216636631002 has 32 divisors (see below), whose sum is σ = 525179712960. Its totient is φ = 65647463760.

The previous prime is 216636630979. The next prime is 216636631007. The reversal of 216636631002 is 200136636612.

216636631002 is a `hidden beast` number, since 2 + 1 + 6 + 636 + 6 + 3 + 10 + 0 + 2 = 666.

216636631002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×216636631002³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (216636631007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182353473 + ... + 182354660.

It is an arithmetic number, because the mean of its divisors is an integer number (16411866030).

Almost surely, 2^216636631002 is an apocalyptic number.

216636631002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

216636631002 is an abundant number, since it is smaller than the sum of its proper divisors (308543081958).

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

216636631002 is a wasteful number, since it uses less digits than its factorization.

216636631002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364708155 (or 364708149 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 216636631002 in words is "two hundred sixteen billion, six hundred thirty-six million, six hundred thirty-one thousand, two".