1248891813953 has 4 divisors (see below), whose sum is σ = 1427304930240. Its totient is φ = 1070478697668.

The previous prime is 1248891813943. The next prime is 1248891813971. The reversal of 1248891813953 is 3593181988421.

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 1248891813953 - 2²⁰ = 1248890765377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1248891813943) 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, 89206558133 + ... + 89206558146.

It is an arithmetic number, because the mean of its divisors is an integer number (356826232560).

Almost surely, 2^{1248891813953} is an apocalyptic number.

It is an amenable number.

1248891813953 is a deficient number, since it is larger than the sum of its proper divisors (178413116287).

1248891813953 is an equidigital number, since it uses as much as digits as its factorization.

1248891813953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178413116286.

The product of its digits is 14929920, while the sum is 62.

The spelling of 1248891813953 in words is "one trillion, two hundred forty-eight billion, eight hundred ninety-one million, eight hundred thirteen thousand, nine hundred fifty-three".