2097556409256 has 256 divisors, whose sum is σ = 6804533329920. Its totient is φ = 527243270400.

The previous prime is 2097556409233. The next prime is 2097556409257. The reversal of 2097556409256 is 6529046557902.

It is a self number, because there is not a number n which added to its sum of digits gives 2097556409256.

It is not an unprimeable number, because it can be changed into a prime (2097556409257) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6780550 + ... + 7083146.

It is an arithmetic number, because the mean of its divisors is an integer number (26580208320).

Almost surely, 2^{2097556409256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2097556409256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3402266664960).

2097556409256 is an abundant number, since it is smaller than the sum of its proper divisors (4706976920664).

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

2097556409256 is a wasteful number, since it uses less digits than its factorization.

2097556409256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302677 (or 302651 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 60.

The spelling of 2097556409256 in words is "two trillion, ninety-seven billion, five hundred fifty-six million, four hundred nine thousand, two hundred fifty-six".