2181629393502 has 64 divisors (see below), whose sum is σ = 4946733765120. Its totient is φ = 635872477824.

The previous prime is 2181629393501. The next prime is 2181629393509. The reversal of 2181629393502 is 2053939261812.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181629393501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14706183 + ... + 14853789.

It is an arithmetic number, because the mean of its divisors is an integer number (77292715080).

Almost surely, 2^{2181629393502} is an apocalyptic number.

2181629393502 is an abundant number, since it is smaller than the sum of its proper divisors (2765104371618).

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

2181629393502 is a wasteful number, since it uses less digits than its factorization.

2181629393502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157617.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 2181629393502 in words is "two trillion, one hundred eighty-one billion, six hundred twenty-nine million, three hundred ninety-three thousand, five hundred two".