1361777321650 has 24 divisors (see below), whose sum is σ = 2551394194740. Its totient is φ = 540734933760.

The previous prime is 1361777321629. The next prime is 1361777321693. The reversal of 1361777321650 is 561237771631.

It can be written as a sum of positive squares in 6 ways, for example, as 249539212521 + 1112238109129 = 499539^2 + 1054627^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1361777321594 and 1361777321603.

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 11 ways as a sum of consecutive naturals, for example, 99392955 + ... + 99406654.

Almost surely, 2^{1361777321650} is an apocalyptic number.

1361777321650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1361777321650 is a deficient number, since it is larger than the sum of its proper divisors (1189616873090).

1361777321650 is a wasteful number, since it uses less digits than its factorization.

1361777321650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198799758 (or 198799753 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 49.

The spelling of 1361777321650 in words is "one trillion, three hundred sixty-one billion, seven hundred seventy-seven million, three hundred twenty-one thousand, six hundred fifty".