155655515550 has 96 divisors (see below), whose sum is σ = 393054914304. Its totient is φ = 40756320000.

The previous prime is 155655515527. The next prime is 155655515551. The reversal of 155655515550 is 55515556551.

It is a super-2 number, since 2×155655515550² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155655515550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155655515551) 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, 3100650 + ... + 3150450.

It is an arithmetic number, because the mean of its divisors is an integer number (4094322024).

Almost surely, 2^155655515550 is an apocalyptic number.

155655515550 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 155655515550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196527457152).

155655515550 is an abundant number, since it is smaller than the sum of its proper divisors (237399398754).

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

155655515550 is a wasteful number, since it uses less digits than its factorization.

155655515550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50194 (or 50189 counting only the distinct ones).

The product of its (nonzero) digits is 2343750, while the sum is 48.

The spelling of 155655515550 in words is "one hundred fifty-five billion, six hundred fifty-five million, five hundred fifteen thousand, five hundred fifty".