1253466643521 has 8 divisors (see below), whose sum is σ = 1671328995840. Its totient is φ = 835624360112.

The previous prime is 1253466643477. The next prime is 1253466643607.

1253466643521 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1253466643521 - 2¹⁷ = 1253466512449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253466643921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4870881 + ... + 5121758.

It is an arithmetic number, because the mean of its divisors is an integer number (208916124480).

Almost surely, 2^{1253466643521} is an apocalyptic number.

It is an amenable number.

1253466643521 is a deficient number, since it is larger than the sum of its proper divisors (417862352319).

1253466643521 is an equidigital number, since it uses as much as digits as its factorization.

1253466643521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10034455.

The product of its digits is 3110400, while the sum is 48.

The spelling of 1253466643521 in words is "one trillion, two hundred fifty-three billion, four hundred sixty-six million, six hundred forty-three thousand, five hundred twenty-one".