1249552023609 has 4 divisors (see below), whose sum is σ = 1666069364816. Its totient is φ = 833034682404.

The previous prime is 1249552023607. The next prime is 1249552023623. The reversal of 1249552023609 is 9063202559421.

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 not a de Polignac number, because 1249552023609 - 2¹ = 1249552023607 is a prime.

It is a super-2 number, since 2×1249552023609² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249552023607) 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 3 ways as a sum of consecutive naturals, for example, 208258670599 + ... + 208258670604.

It is an arithmetic number, because the mean of its divisors is an integer number (416517341204).

Almost surely, 2^{1249552023609} is an apocalyptic number.

It is an amenable number.

1249552023609 is a deficient number, since it is larger than the sum of its proper divisors (416517341207).

1249552023609 is an equidigital number, since it uses as much as digits as its factorization.

1249552023609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416517341206.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 1249552023609 in words is "one trillion, two hundred forty-nine billion, five hundred fifty-two million, twenty-three thousand, six hundred nine".