1605055000 has 160 divisors (see below), whose sum is σ = 4160043360. Its totient is φ = 577280000.

The previous prime is 1605054991. The next prime is 1605055009. The reversal of 1605055000 is 5505061.

It is an interprime number because it is at equal distance from previous prime (1605054991) and next prime (1605055009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605055009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1954590 + ... + 1955410.

It is an arithmetic number, because the mean of its divisors is an integer number (26000271).

Almost surely, 2^1605055000 is an apocalyptic number.

1605055000 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 1605055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2080021680).

1605055000 is an abundant number, since it is smaller than the sum of its proper divisors (2554988360).

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

1605055000 is a wasteful number, since it uses less digits than its factorization.

1605055000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 1605055000 is about 40063.1376704322. The cubic root of 1605055000 is about 1170.8375428506.

The spelling of 1605055000 in words is "one billion, six hundred five million, fifty-five thousand".