1165520205050 has 12 divisors (see below), whose sum is σ = 2167867581486. Its totient is φ = 466208082000.

The previous prime is 1165520205019. The next prime is 1165520205067. The reversal of 1165520205050 is 505020255611.

It can be written as a sum of positive squares in 3 ways, for example, as 1017054097081 + 148466107969 = 1008491^2 + 385313^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1165520204998 and 1165520205016.

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, 11655202001 + ... + 11655202100.

Almost surely, 2^{1165520205050} is an apocalyptic number.

1165520205050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1165520205050 is a deficient number, since it is larger than the sum of its proper divisors (1002347376436).

1165520205050 is a wasteful number, since it uses less digits than its factorization.

1165520205050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23310404113 (or 23310404108 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 1165520205050 in words is "one trillion, one hundred sixty-five billion, five hundred twenty million, two hundred five thousand, fifty".