10381912650 has 72 divisors (see below), whose sum is σ = 27982232460. Its totient is φ = 2759627520.

The previous prime is 10381912649. The next prime is 10381912663. The reversal of 10381912650 is 5621918301.

10381912650 is a `hidden beast` number, since 10 + 381 + 9 + 1 + 265 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 10323369 + 10371589281 = 3213^2 + 101841^2 .

It is a super-2 number, since 2×10381912650² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 103996 + ... + 177704.

Almost surely, 2^10381912650 is an apocalyptic number.

10381912650 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 10381912650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13991116230).

10381912650 is an abundant number, since it is smaller than the sum of its proper divisors (17600319810).

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

10381912650 is a wasteful number, since it uses less digits than its factorization.

10381912650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74040 (or 74032 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 10381912650 in words is "ten billion, three hundred eighty-one million, nine hundred twelve thousand, six hundred fifty".