1603256055261 has 16 divisors (see below), whose sum is σ = 2495036780544. Its totient is φ = 896653841904.

The previous prime is 1603256055259. The next prime is 1603256055329. The reversal of 1603256055261 is 1625506523061.

It is not a de Polignac number, because 1603256055261 - 2¹ = 1603256055259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603256055221) 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 15 ways as a sum of consecutive naturals, for example, 812185465 + ... + 812187438.

It is an arithmetic number, because the mean of its divisors is an integer number (155939798784).

Almost surely, 2^{1603256055261} is an apocalyptic number.

It is an amenable number.

1603256055261 is a deficient number, since it is larger than the sum of its proper divisors (891780725283).

1603256055261 is a wasteful number, since it uses less digits than its factorization.

1603256055261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624372960.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 1603256055261 in words is "one trillion, six hundred three billion, two hundred fifty-six million, fifty-five thousand, two hundred sixty-one".