1605643260260 has 192 divisors, whose sum is σ = 3756807715584. Its totient is φ = 572749056000.

The previous prime is 1605643260239. The next prime is 1605643260269. The reversal of 1605643260260 is 620623465061.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1605643260269) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 396355235 + ... + 396359285.

It is an arithmetic number, because the mean of its divisors is an integer number (19566706852).

Almost surely, 2^{1605643260260} is an apocalyptic number.

1605643260260 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 1605643260260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878403857792).

1605643260260 is an abundant number, since it is smaller than the sum of its proper divisors (2151164455324).

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

1605643260260 is a wasteful number, since it uses less digits than its factorization.

1605643260260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574 (or 4572 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 1605643260260 in words is "one trillion, six hundred five billion, six hundred forty-three million, two hundred sixty thousand, two hundred sixty".