10821491650 has 12 divisors (see below), whose sum is σ = 20127974562. Its totient is φ = 4328596640.

The previous prime is 10821491633. The next prime is 10821491663. The reversal of 10821491650 is 5619412801.

It can be written as a sum of positive squares in 3 ways, for example, as 7027301241 + 3794190409 = 83829^2 + 61597^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108214867 + ... + 108214966.

Almost surely, 2^10821491650 is an apocalyptic number.

10821491650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10821491650 is a deficient number, since it is larger than the sum of its proper divisors (9306482912).

10821491650 is a wasteful number, since it uses less digits than its factorization.

10821491650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216429845 (or 216429840 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 10821491650 in words is "ten billion, eight hundred twenty-one million, four hundred ninety-one thousand, six hundred fifty".