1985608555 has 8 divisors (see below), whose sum is σ = 2723120352. Its totient is φ = 1361560128.

The previous prime is 1985608531. The next prime is 1985608567. The reversal of 1985608555 is 5558065891.

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 1985608555 - 2¹³ = 1985600363 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, 28365802 + ... + 28365871.

It is an arithmetic number, because the mean of its divisors is an integer number (340390044).

Almost surely, 2^1985608555 is an apocalyptic number.

1985608555 is a deficient number, since it is larger than the sum of its proper divisors (737511797).

1985608555 is an equidigital number, since it uses as much as digits as its factorization.

1985608555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56731685.

The product of its (nonzero) digits is 2160000, while the sum is 52.

The square root of 1985608555 is about 44560.1678071347. The cubic root of 1985608555 is about 1256.8917581710.

The spelling of 1985608555 in words is "one billion, nine hundred eighty-five million, six hundred eight thousand, five hundred fifty-five".