2113661261250 has 480 divisors, whose sum is σ = 7145090739072. Its totient is φ = 438566400000.

The previous prime is 2113661261219. The next prime is 2113661261251. The reversal of 2113661261250 is 521621663112.

2113661261250 is a `hidden beast` number, since 2 + 1 + 1 + 36 + 6 + 1 + 2 + 612 + 5 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (2113661261251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 815139954 + ... + 815142546.

Almost surely, 2^{2113661261250} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2113661261250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3572545369536).

2113661261250 is an abundant number, since it is smaller than the sum of its proper divisors (5031429477822).

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

2113661261250 is a wasteful number, since it uses less digits than its factorization.

2113661261250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580 (or 3562 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 2113661261250 in words is "two trillion, one hundred thirteen billion, six hundred sixty-one million, two hundred sixty-one thousand, two hundred fifty".