1365505550 has 12 divisors (see below), whose sum is σ = 2539840416. Its totient is φ = 546202200.

The previous prime is 1365505487. The next prime is 1365505553. The reversal of 1365505550 is 555055631.

It is a self number, because there is not a number n which added to its sum of digits gives 1365505550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1365505553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13655006 + ... + 13655105.

It is an arithmetic number, because the mean of its divisors is an integer number (211653368).

Almost surely, 2^1365505550 is an apocalyptic number.

1365505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1365505550 is a deficient number, since it is larger than the sum of its proper divisors (1174334866).

1365505550 is a wasteful number, since it uses less digits than its factorization.

1365505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27310123 (or 27310118 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 35.

The square root of 1365505550 is about 36952.7475297846. The cubic root of 1365505550 is about 1109.4246808935.

The spelling of 1365505550 in words is "one billion, three hundred sixty-five million, five hundred five thousand, five hundred fifty".