10521775650 has 48 divisors (see below), whose sum is σ = 26993808000. Its totient is φ = 2709053760.

The previous prime is 10521775637. The next prime is 10521775669. The reversal of 10521775650 is 5657712501.

It is a super-2 number, since 2×10521775650² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10521775599 and 10521775608.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1205050 + ... + 1213749.

It is an arithmetic number, because the mean of its divisors is an integer number (562371000).

Almost surely, 2^10521775650 is an apocalyptic number.

10521775650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10521775650 is an abundant number, since it is smaller than the sum of its proper divisors (16472032350).

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

10521775650 is a wasteful number, since it uses less digits than its factorization.

10521775650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418843 (or 2418838 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 39.

The spelling of 10521775650 in words is "ten billion, five hundred twenty-one million, seven hundred seventy-five thousand, six hundred fifty".