215980032720 has 80 divisors (see below), whose sum is σ = 669802665600. Its totient is φ = 57571917312.

The previous prime is 215980032689. The next prime is 215980032731. The reversal of 215980032720 is 27230089512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435237 + ... + 788283.

It is an arithmetic number, because the mean of its divisors is an integer number (8372533320).

Almost surely, 2^215980032720 is an apocalyptic number.

215980032720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215980032720 is an abundant number, since it is smaller than the sum of its proper divisors (453822632880).

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

215980032720 is a wasteful number, since it uses less digits than its factorization.

215980032720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355612 (or 355606 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 215980032720 in words is "two hundred fifteen billion, nine hundred eighty million, thirty-two thousand, seven hundred twenty".