211587985680 has 80 divisors (see below), whose sum is σ = 662684918784. Its totient is φ = 55841771520.

The previous prime is 211587985667. The next prime is 211587985681. The reversal of 211587985680 is 86589785112.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (211587985681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4521136 + ... + 4567695.

Almost surely, 2^211587985680 is an apocalyptic number.

211587985680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211587985680 is an abundant number, since it is smaller than the sum of its proper divisors (451096933104).

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

211587985680 is a wasteful number, since it uses less digits than its factorization.

211587985680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088944 (or 9088938 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 60.

The spelling of 211587985680 in words is "two hundred eleven billion, five hundred eighty-seven million, nine hundred eighty-five thousand, six hundred eighty".