2101297680 has 80 divisors (see below), whose sum is σ = 7237810560. Its totient is φ = 560345472.

The previous prime is 2101297669. The next prime is 2101297703. The reversal of 2101297680 is 867921012.

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 (36).

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, 484252 + ... + 488571.

It is an arithmetic number, because the mean of its divisors is an integer number (90472632).

Almost surely, 2^2101297680 is an apocalyptic number.

2101297680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101297680 is an abundant number, since it is smaller than the sum of its proper divisors (5136512880).

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

2101297680 is a wasteful number, since it uses less digits than its factorization.

2101297680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972845 (or 972833 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 2101297680 is about 45839.9136124840. The cubic root of 2101297680 is about 1280.8428855895.

It can be divided in two parts, 21012976 and 80, that added together give a square (21013056 = 4584²).

The spelling of 2101297680 in words is "two billion, one hundred one million, two hundred ninety-seven thousand, six hundred eighty".