1381550650 has 24 divisors (see below), whose sum is σ = 2652580224. Its totient is φ = 534793200.

The previous prime is 1381550647. The next prime is 1381550689. The reversal of 1381550650 is 560551831.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444112 + ... + 447211.

It is an arithmetic number, because the mean of its divisors is an integer number (110524176).

Almost surely, 2^1381550650 is an apocalyptic number.

1381550650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381550650 is a deficient number, since it is larger than the sum of its proper divisors (1271029574).

1381550650 is a wasteful number, since it uses less digits than its factorization.

1381550650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891366 (or 891361 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1381550650 is about 37169.2164297285. The cubic root of 1381550650 is about 1113.7531290286.

The spelling of 1381550650 in words is "one billion, three hundred eighty-one million, five hundred fifty thousand, six hundred fifty".