1655536553 has 4 divisors (see below), whose sum is σ = 1806039888. Its totient is φ = 1505033220.

The previous prime is 1655536541. The next prime is 1655536577. The reversal of 1655536553 is 3556355561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1655536553 - 2⁴ = 1655536537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655536853) 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, 75251651 + ... + 75251672.

It is an arithmetic number, because the mean of its divisors is an integer number (451509972).

Almost surely, 2^1655536553 is an apocalyptic number.

It is an amenable number.

1655536553 is a deficient number, since it is larger than the sum of its proper divisors (150503335).

1655536553 is a wasteful number, since it uses less digits than its factorization.

1655536553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150503334.

The product of its digits is 1012500, while the sum is 44.

The square root of 1655536553 is about 40688.2852059410. The cubic root of 1655536553 is about 1182.9859628052.

The spelling of 1655536553 in words is "one billion, six hundred fifty-five million, five hundred thirty-six thousand, five hundred fifty-three".