10565215650 has 144 divisors (see below), whose sum is σ = 31128945120. Its totient is φ = 2547763200.

The previous prime is 10565215637. The next prime is 10565215651. The reversal of 10565215650 is 5651256501.

10565215650 is a `hidden beast` number, since 10 + 5 + 65 + 21 + 565 + 0 = 666.

It is a super-2 number, since 2×10565215650² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10565215651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 949821 + ... + 960879.

It is an arithmetic number, because the mean of its divisors is an integer number (216173230).

Almost surely, 2^10565215650 is an apocalyptic number.

10565215650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10565215650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15564472560).

10565215650 is an abundant number, since it is smaller than the sum of its proper divisors (20563729470).

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

10565215650 is a wasteful number, since it uses less digits than its factorization.

10565215650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11281 (or 11273 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 10565215650 in words is "ten billion, five hundred sixty-five million, two hundred fifteen thousand, six hundred fifty".