215656641632 has 12 divisors (see below), whose sum is σ = 424574013276. Its totient is φ = 107828320800.

The previous prime is 215656641581. The next prime is 215656641661. The reversal of 215656641632 is 236146656512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3369634994 + ... + 3369635057.

It is an arithmetic number, because the mean of its divisors is an integer number (35381167773).

Almost surely, 2^215656641632 is an apocalyptic number.

It is an amenable number.

215656641632 is a deficient number, since it is larger than the sum of its proper divisors (208917371644).

215656641632 is an equidigital number, since it uses as much as digits as its factorization.

215656641632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6739270061 (or 6739270053 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 47.

The spelling of 215656641632 in words is "two hundred fifteen billion, six hundred fifty-six million, six hundred forty-one thousand, six hundred thirty-two".