2011656002550 has 192 divisors, whose sum is σ = 5337708364800. Its totient is φ = 500578790400.

The previous prime is 2011656002539. The next prime is 2011656002593. The reversal of 2011656002550 is 552006561102.

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, 13350531 + ... + 13500369.

It is an arithmetic number, because the mean of its divisors is an integer number (27800564400).

Almost surely, 2^{2011656002550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011656002550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2668854182400).

2011656002550 is an abundant number, since it is smaller than the sum of its proper divisors (3326052362250).

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

2011656002550 is a wasteful number, since it uses less digits than its factorization.

2011656002550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149991 (or 149986 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 2011656002550 in words is "two trillion, eleven billion, six hundred fifty-six million, two thousand, five hundred fifty".