2121606153636 has 96 divisors (see below), whose sum is σ = 5175227904000. Its totient is φ = 675604758528.

The previous prime is 2121606153571. The next prime is 2121606153659. The reversal of 2121606153636 is 6363516061212.

It is a super-2 number, since 2×2121606153636² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237604020 + ... + 237612948.

It is an arithmetic number, because the mean of its divisors is an integer number (53908624000).

Almost surely, 2^{2121606153636} 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 2121606153636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2587613952000).

2121606153636 is an abundant number, since it is smaller than the sum of its proper divisors (3053621750364).

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

2121606153636 is a wasteful number, since it uses less digits than its factorization.

2121606153636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16101 (or 16099 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 2121606153636 in words is "two trillion, one hundred twenty-one billion, six hundred six million, one hundred fifty-three thousand, six hundred thirty-six".