201135544155550 has 24 divisors (see below), whose sum is σ = 380245097579832. Its totient is φ = 79135296060000.

The previous prime is 201135544155541. The next prime is 201135544155563. The reversal of 201135544155550 is 55551445531102.

It is a self number, because there is not a number n which added to its sum of digits gives 201135544155550.

It is a congruent number.

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, 32973036976 + ... + 32973043075.

It is an arithmetic number, because the mean of its divisors is an integer number (15843545732493).

Almost surely, 2^{201135544155550} is an apocalyptic number.

201135544155550 is a deficient number, since it is larger than the sum of its proper divisors (179109553424282).

201135544155550 is a wasteful number, since it uses less digits than its factorization.

201135544155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65946080124 (or 65946080119 counting only the distinct ones).

The product of its (nonzero) digits is 1500000, while the sum is 46.

Adding to 201135544155550 its reverse (55551445531102), we get a palindrome (256686989686652).

The spelling of 201135544155550 in words is "two hundred one trillion, one hundred thirty-five billion, five hundred forty-four million, one hundred fifty-five thousand, five hundred fifty".