2789558337940 has 144 divisors (see below), whose sum is σ = 6470465432256. Its totient is φ = 1009446197760.

The previous prime is 2789558337913. The next prime is 2789558337991. The reversal of 2789558337940 is 497338559872.

It is a self number, because there is not a number n which added to its sum of digits gives 2789558337940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 459334744 + ... + 459340816.

It is an arithmetic number, because the mean of its divisors is an integer number (44933787724).

Almost surely, 2^{2789558337940} is an apocalyptic number.

2789558337940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2789558337940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3235232716128).

2789558337940 is an abundant number, since it is smaller than the sum of its proper divisors (3680907094316).

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

2789558337940 is a wasteful number, since it uses less digits than its factorization.

2789558337940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6998 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 457228800, while the sum is 70.

The spelling of 2789558337940 in words is "two trillion, seven hundred eighty-nine billion, five hundred fifty-eight million, three hundred thirty-seven thousand, nine hundred forty".