1606255772550 has 192 divisors, whose sum is σ = 4699529210880. Its totient is φ = 357936768000.

The previous prime is 1606255772531. The next prime is 1606255772551. The reversal of 1606255772550 is 552775526061.

It is a junction number, because it is equal to n+sod(n) for n = 1606255772493 and 1606255772502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606255772551) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4969890 + ... + 5283210.

It is an arithmetic number, because the mean of its divisors is an integer number (24476714640).

Almost surely, 2^{1606255772550} is an apocalyptic number.

1606255772550 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 1606255772550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349764605440).

1606255772550 is an abundant number, since it is smaller than the sum of its proper divisors (3093273438330).

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

1606255772550 is a wasteful number, since it uses less digits than its factorization.

1606255772550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313599 (or 313594 counting only the distinct ones).

The product of its (nonzero) digits is 4410000, while the sum is 51.

The spelling of 1606255772550 in words is "one trillion, six hundred six billion, two hundred fifty-five million, seven hundred seventy-two thousand, five hundred fifty".