250001263649 has 4 divisors (see below), whose sum is σ = 251969777664. Its totient is φ = 248032749636.

The previous prime is 250001263637. The next prime is 250001263723. The reversal of 250001263649 is 946362100052.

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 250001263649 - 2²⁸ = 249732828193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250001263949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984256817 + ... + 984257070.

It is an arithmetic number, because the mean of its divisors is an integer number (62992444416).

Almost surely, 2^250001263649 is an apocalyptic number.

It is an amenable number.

250001263649 is a deficient number, since it is larger than the sum of its proper divisors (1968514015).

250001263649 is a wasteful number, since it uses less digits than its factorization.

250001263649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968514014.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 250001263649 in words is "two hundred fifty billion, one million, two hundred sixty-three thousand, six hundred forty-nine".