215615771156 has 6 divisors (see below), whose sum is σ = 377327599530. Its totient is φ = 107807885576.

The previous prime is 215615771149. The next prime is 215615771171. The reversal of 215615771156 is 651177516512.

215615771156 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 213240768400 + 2375002756 = 461780^2 + 48734^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215615771156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26951971391 + ... + 26951971398.

It is an arithmetic number, because the mean of its divisors is an integer number (62887933255).

Almost surely, 2^215615771156 is an apocalyptic number.

It is an amenable number.

215615771156 is a deficient number, since it is larger than the sum of its proper divisors (161711828374).

215615771156 is a wasteful number, since it uses less digits than its factorization.

215615771156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53903942793 (or 53903942791 counting only the distinct ones).

The product of its digits is 441000, while the sum is 47.

The spelling of 215615771156 in words is "two hundred fifteen billion, six hundred fifteen million, seven hundred seventy-one thousand, one hundred fifty-six".