1381689534850 has 12 divisors (see below), whose sum is σ = 2569942534914. Its totient is φ = 552675813920.

The previous prime is 1381689534839. The next prime is 1381689534917. The reversal of 1381689534850 is 584359861831.

It can be written as a sum of positive squares in 3 ways, for example, as 1192488024121 + 189201510729 = 1092011^2 + 434973^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13816895299 + ... + 13816895398.

Almost surely, 2^{1381689534850} is an apocalyptic number.

1381689534850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381689534850 is a deficient number, since it is larger than the sum of its proper divisors (1188253000064).

1381689534850 is a wasteful number, since it uses less digits than its factorization.

1381689534850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27633790709 (or 27633790704 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 1381689534850 in words is "one trillion, three hundred eighty-one billion, six hundred eighty-nine million, five hundred thirty-four thousand, eight hundred fifty".