1653256555 has 4 divisors (see below), whose sum is σ = 1983907872. Its totient is φ = 1322605240.

The previous prime is 1653256547. The next prime is 1653256559. The reversal of 1653256555 is 5556523561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1653256555 - 2³ = 1653256547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1653256559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165325651 + ... + 165325660.

It is an arithmetic number, because the mean of its divisors is an integer number (495976968).

Almost surely, 2^1653256555 is an apocalyptic number.

1653256555 is a deficient number, since it is larger than the sum of its proper divisors (330651317).

1653256555 is an equidigital number, since it uses as much as digits as its factorization.

1653256555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330651316.

The product of its digits is 675000, while the sum is 43.

The square root of 1653256555 is about 40660.2576848696. The cubic root of 1653256555 is about 1182.4426455412.

The spelling of 1653256555 in words is "one billion, six hundred fifty-three million, two hundred fifty-six thousand, five hundred fifty-five".