2158561350 has 216 divisors, whose sum is σ = 6599108880. Its totient is φ = 504873600.

The previous prime is 2158561331. The next prime is 2158561393. The reversal of 2158561350 is 531658512.

It is a happy number.

2158561350 is a `hidden beast` number, since 21 + 585 + 6 + 1 + 3 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1578367 + ... + 1579733.

It is an arithmetic number, because the mean of its divisors is an integer number (30551430).

Almost surely, 2^2158561350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2158561350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3299554440).

2158561350 is an abundant number, since it is smaller than the sum of its proper divisors (4440547530).

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

2158561350 is a wasteful number, since it uses less digits than its factorization.

2158561350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 2158561350 is about 46460.3201667832. The cubic root of 2158561350 is about 1292.3737616257.

The spelling of 2158561350 in words is "two billion, one hundred fifty-eight million, five hundred sixty-one thousand, three hundred fifty".