1355555550 has 48 divisors (see below), whose sum is σ = 3374284032. Its totient is φ = 360136800.

The previous prime is 1355555491. The next prime is 1355555561. The reversal of 1355555550 is 555555531.

It is a junction number, because it is equal to n+sod(n) for n = 1355555499 and 1355555508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23977 + ... + 57323.

It is an arithmetic number, because the mean of its divisors is an integer number (70297584).

Almost surely, 2^1355555550 is an apocalyptic number.

1355555550 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 1355555550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687142016).

1355555550 is an abundant number, since it is smaller than the sum of its proper divisors (2018728482).

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

1355555550 is a wasteful number, since it uses less digits than its factorization.

1355555550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33633 (or 33628 counting only the distinct ones).

The product of its (nonzero) digits is 234375, while the sum is 39.

The square root of 1355555550 is about 36817.8699818444. The cubic root of 1355555550 is about 1106.7234355203.

The spelling of 1355555550 in words is "one billion, three hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty".