1655005655 has 4 divisors (see below), whose sum is σ = 1986006792. Its totient is φ = 1324004520.

The previous prime is 1655005643. The next prime is 1655005663. The reversal of 1655005655 is 5565005561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5565005561 = 227 ⋅24515443.

It is not a de Polignac number, because 1655005655 - 2¹⁸ = 1654743511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165500561 + ... + 165500570.

It is an arithmetic number, because the mean of its divisors is an integer number (496501698).

Almost surely, 2^1655005655 is an apocalyptic number.

1655005655 is a deficient number, since it is larger than the sum of its proper divisors (331001137).

1655005655 is an equidigital number, since it uses as much as digits as its factorization.

1655005655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331001136.

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 1655005655 is about 40681.7607165668. The cubic root of 1655005655 is about 1182.8594958447.

The spelling of 1655005655 in words is "one billion, six hundred fifty-five million, five thousand, six hundred fifty-five".