2688721986740 has 48 divisors (see below), whose sum is σ = 5653049875200. Its totient is φ = 1074206901120.

The previous prime is 2688721986737. The next prime is 2688721986749. The reversal of 2688721986740 is 476891278862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688721986749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65639786 + ... + 65680734.

It is an arithmetic number, because the mean of its divisors is an integer number (117771872400).

Almost surely, 2^{2688721986740} is an apocalyptic number.

2688721986740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2688721986740 is an abundant number, since it is smaller than the sum of its proper divisors (2964327888460).

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

2688721986740 is a wasteful number, since it uses less digits than its factorization.

2688721986740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44792 (or 44790 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 68.

The spelling of 2688721986740 in words is "two trillion, six hundred eighty-eight billion, seven hundred twenty-one million, nine hundred eighty-six thousand, seven hundred forty".