1555650655 has 32 divisors (see below), whose sum is σ = 2109744000. Its totient is φ = 1092579840.

The previous prime is 1555650623. The next prime is 1555650661. The reversal of 1555650655 is 5560565551.

It is not a de Polignac number, because 1555650655 - 2⁵ = 1555650623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267721 + ... + 273469.

It is an arithmetic number, because the mean of its divisors is an integer number (65929500).

Almost surely, 2^1555650655 is an apocalyptic number.

1555650655 is a deficient number, since it is larger than the sum of its proper divisors (554093345).

1555650655 is a wasteful number, since it uses less digits than its factorization.

1555650655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5971.

The product of its (nonzero) digits is 562500, while the sum is 43.

The square root of 1555650655 is about 39441.7374744065. The cubic root of 1555650655 is about 1158.6991598288.

The spelling of 1555650655 in words is "one billion, five hundred fifty-five million, six hundred fifty thousand, six hundred fifty-five".