1606256603555 has 8 divisors (see below), whose sum is σ = 1933666098432. Its totient is φ = 1280899833408.

The previous prime is 1606256603507. The next prime is 1606256603563. The reversal of 1606256603555 is 5553066526061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1606256603555 - 2¹⁸ = 1606256341411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513179459 + ... + 513182588.

It is an arithmetic number, because the mean of its divisors is an integer number (241708262304).

Almost surely, 2^{1606256603555} is an apocalyptic number.

1606256603555 is a deficient number, since it is larger than the sum of its proper divisors (327409494877).

1606256603555 is a wasteful number, since it uses less digits than its factorization.

1606256603555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026362365.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 1606256603555 in words is "one trillion, six hundred six billion, two hundred fifty-six million, six hundred three thousand, five hundred fifty-five".