2256165041550 has 192 divisors, whose sum is σ = 6526525847040. Its totient is φ = 505120273920.

The previous prime is 2256165041549. The next prime is 2256165041563. The reversal of 2256165041550 is 551405616522.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17094412 + ... + 17225888.

It is an arithmetic number, because the mean of its divisors is an integer number (33992322120).

Almost surely, 2^{2256165041550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2256165041550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3263262923520).

2256165041550 is an abundant number, since it is smaller than the sum of its proper divisors (4270360805490).

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

2256165041550 is a wasteful number, since it uses less digits than its factorization.

2256165041550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131835 (or 131830 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 2256165041550 in words is "two trillion, two hundred fifty-six billion, one hundred sixty-five million, forty-one thousand, five hundred fifty".