215475086680 has 32 divisors (see below), whose sum is σ = 554078795040. Its totient is φ = 73877172480.

The previous prime is 215475086677. The next prime is 215475086689. The reversal of 215475086680 is 86680574512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215475086689) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 384776661 + ... + 384777220.

It is an arithmetic number, because the mean of its divisors is an integer number (17314962345).

Almost surely, 2^215475086680 is an apocalyptic number.

215475086680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215475086680 is an abundant number, since it is smaller than the sum of its proper divisors (338603708360).

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

215475086680 is a wasteful number, since it uses less digits than its factorization.

215475086680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769553899 (or 769553895 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 215475086680 in words is "two hundred fifteen billion, four hundred seventy-five million, eighty-six thousand, six hundred eighty".