1655276653 has 4 divisors (see below), whose sum is σ = 1658529180. Its totient is φ = 1652024128.

The previous prime is 1655276633. The next prime is 1655276669. The reversal of 1655276653 is 3566725561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3566725561 = 7 ⋅509532223.

It can be written as a sum of positive squares in 2 ways, for example, as 1244890089 + 410386564 = 35283^2 + 20258^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655276653 - 2¹⁷ = 1655145581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655276603) 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, 1625500 + ... + 1626517.

It is an arithmetic number, because the mean of its divisors is an integer number (414632295).

Almost surely, 2^1655276653 is an apocalyptic number.

It is an amenable number.

1655276653 is a deficient number, since it is larger than the sum of its proper divisors (3252527).

1655276653 is an equidigital number, since it uses as much as digits as its factorization.

1655276653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252526.

The product of its digits is 1134000, while the sum is 46.

The square root of 1655276653 is about 40685.0912866126. The cubic root of 1655276653 is about 1182.9240545492.

The spelling of 1655276653 in words is "one billion, six hundred fifty-five million, two hundred seventy-six thousand, six hundred fifty-three".