1605470421550 has 24 divisors (see below), whose sum is σ = 2986223601600. Its totient is φ = 642177713280.

The previous prime is 1605470421517. The next prime is 1605470421553. The reversal of 1605470421550 is 551240745061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605470421553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3328611 + ... + 3780289.

It is an arithmetic number, because the mean of its divisors is an integer number (124425983400).

Almost surely, 2^{1605470421550} is an apocalyptic number.

1605470421550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1605470421550 is a deficient number, since it is larger than the sum of its proper divisors (1380753180050).

1605470421550 is a wasteful number, since it uses less digits than its factorization.

1605470421550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522780 (or 522775 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 1605470421550 in words is "one trillion, six hundred five billion, four hundred seventy million, four hundred twenty-one thousand, five hundred fifty".