1253654247613 has 4 divisors (see below), whose sum is σ = 1259128720540. Its totient is φ = 1248179774688.

The previous prime is 1253654247497. The next prime is 1253654247623. The reversal of 1253654247613 is 3167424563521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1189849003204 + 63805244409 = 1090802^2 + 252597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253654247613 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 (1253654247623) 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, 2737236120 + ... + 2737236577.

It is an arithmetic number, because the mean of its divisors is an integer number (314782180135).

Almost surely, 2^{1253654247613} is an apocalyptic number.

It is an amenable number.

1253654247613 is a deficient number, since it is larger than the sum of its proper divisors (5474472927).

1253654247613 is an equidigital number, since it uses as much as digits as its factorization.

1253654247613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474472926.

The product of its digits is 3628800, while the sum is 49.

The spelling of 1253654247613 in words is "one trillion, two hundred fifty-three billion, six hundred fifty-four million, two hundred forty-seven thousand, six hundred thirteen".