1555601606655 has 8 divisors (see below), whose sum is σ = 2488962570672. Its totient is φ = 829654190208.

The previous prime is 1555601606633. The next prime is 1555601606707. The reversal of 1555601606655 is 5566061065551.

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

It is not a de Polignac number, because 1555601606655 - 2⁷ = 1555601606527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1555601606598 and 1555601606607.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51853386874 + ... + 51853386903.

It is an arithmetic number, because the mean of its divisors is an integer number (311120321334).

Almost surely, 2^{1555601606655} is an apocalyptic number.

1555601606655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1555601606655 is a deficient number, since it is larger than the sum of its proper divisors (933360964017).

1555601606655 is a wasteful number, since it uses less digits than its factorization.

1555601606655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103706773785.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 1555601606655 in words is "one trillion, five hundred fifty-five billion, six hundred one million, six hundred six thousand, six hundred fifty-five".