155556560550 has 96 divisors (see below), whose sum is σ = 392779458720. Its totient is φ = 40731494400.

The previous prime is 155556560527. The next prime is 155556560557. The reversal of 155556560550 is 55065655551.

It is a self number, because there is not a number n which added to its sum of digits gives 155556560550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155556560557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5411616 + ... + 5440284.

It is an arithmetic number, because the mean of its divisors is an integer number (4091452695).

Almost surely, 2^155556560550 is an apocalyptic number.

155556560550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155556560550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196389729360).

155556560550 is an abundant number, since it is smaller than the sum of its proper divisors (237222898170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155556560550 is a wasteful number, since it uses less digits than its factorization.

155556560550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29338 (or 29333 counting only the distinct ones).

The product of its (nonzero) digits is 2812500, while the sum is 48.

The spelling of 155556560550 in words is "one hundred fifty-five billion, five hundred fifty-six million, five hundred sixty thousand, five hundred fifty".