1555055000 has 80 divisors (see below), whose sum is σ = 3835491000. Its totient is φ = 589248000.

The previous prime is 1555054999. The next prime is 1555055003. The reversal of 1555055000 is 5505551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555055003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 86816 + ... + 103184.

Almost surely, 2^1555055000 is an apocalyptic number.

1555055000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1555055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917745500).

1555055000 is an abundant number, since it is smaller than the sum of its proper divisors (2280436000).

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

1555055000 is a wasteful number, since it uses less digits than its factorization.

1555055000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16414 (or 16395 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 1555055000 is about 39434.1856768971. The cubic root of 1555055000 is about 1158.5512532161.

The spelling of 1555055000 in words is "one billion, five hundred fifty-five million, fifty-five thousand".