1253613457237 has 4 divisors (see below), whose sum is σ = 1253811914316. Its totient is φ = 1253415000160.

The previous prime is 1253613457199. The next prime is 1253613457277. The reversal of 1253613457237 is 7327543163521.

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 890156397361 + 363457059876 = 943481^2 + 602874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253613457237 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 (1253613457277) 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, 99219064 + ... + 99231697.

It is an arithmetic number, because the mean of its divisors is an integer number (313452978579).

Almost surely, 2^{1253613457237} is an apocalyptic number.

It is an amenable number.

1253613457237 is a deficient number, since it is larger than the sum of its proper divisors (198457079).

1253613457237 is an equidigital number, since it uses as much as digits as its factorization.

1253613457237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198457078.

The product of its digits is 3175200, while the sum is 49.

The spelling of 1253613457237 in words is "one trillion, two hundred fifty-three billion, six hundred thirteen million, four hundred fifty-seven thousand, two hundred thirty-seven".