2159755650 has 480 divisors, whose sum is σ = 7259535360. Its totient is φ = 470292480.

The previous prime is 2159755649. The next prime is 2159755693. The reversal of 2159755650 is 565579512.

2159755650 is a `hidden beast` number, since 2 + 1 + 5 + 97 + 556 + 5 + 0 = 666.

It is a super-6 number, since 6×2159755650⁶ (a number of 57 digits) contains 666666 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 2159755596 and 2159755605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 17005887 + ... + 17006013.

It is an arithmetic number, because the mean of its divisors is an integer number (15124032).

Almost surely, 2^2159755650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159755650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3629767680).

2159755650 is an abundant number, since it is smaller than the sum of its proper divisors (5099779710).

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

2159755650 is a wasteful number, since it uses less digits than its factorization.

2159755650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 472500, while the sum is 45.

The square root of 2159755650 is about 46473.1712926932. The cubic root of 2159755650 is about 1292.6120680961.

The spelling of 2159755650 in words is "two billion, one hundred fifty-nine million, seven hundred fifty-five thousand, six hundred fifty".