1555285655 has 64 divisors (see below), whose sum is σ = 2420637696. Its totient is φ = 930960000.

The previous prime is 1555285651. The next prime is 1555285661. The reversal of 1555285655 is 5565825551.

It is not a de Polignac number, because 1555285655 - 2² = 1555285651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555285651) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1801754 + ... + 1802616.

It is an arithmetic number, because the mean of its divisors is an integer number (37822464).

Almost surely, 2^1555285655 is an apocalyptic number.

1555285655 is a deficient number, since it is larger than the sum of its proper divisors (865352041).

1555285655 is a wasteful number, since it uses less digits than its factorization.

1555285655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its digits is 1500000, while the sum is 47.

The square root of 1555285655 is about 39437.1101248558. The cubic root of 1555285655 is about 1158.6085314535.

The spelling of 1555285655 in words is "one billion, five hundred fifty-five million, two hundred eighty-five thousand, six hundred fifty-five".