1553123453 has 12 divisors (see below), whose sum is σ = 1807678620. Its totient is φ = 1330523712.

The previous prime is 1553123437. The next prime is 1553123459. The reversal of 1553123453 is 3543213551.

It can be written as a sum of positive squares in 2 ways, for example, as 1404600484 + 148522969 = 37478^2 + 12187^2 .

It is not a de Polignac number, because 1553123453 - 2⁴ = 1553123437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553123459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94775 + ... + 109947.

It is an arithmetic number, because the mean of its divisors is an integer number (150639885).

Almost surely, 2^1553123453 is an apocalyptic number.

It is an amenable number.

1553123453 is a deficient number, since it is larger than the sum of its proper divisors (254555167).

1553123453 is a wasteful number, since it uses less digits than its factorization.

1553123453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17276 (or 17269 counting only the distinct ones).

The product of its digits is 27000, while the sum is 32.

The square root of 1553123453 is about 39409.6872989370. The cubic root of 1553123453 is about 1158.0713723617.

The spelling of 1553123453 in words is "one billion, five hundred fifty-three million, one hundred twenty-three thousand, four hundred fifty-three".