249049403648 has 72 divisors (see below), whose sum is σ = 499225791456. Its totient is φ = 123999948800.

The previous prime is 249049403639. The next prime is 249049403653. The reversal of 249049403648 is 846304940942.

It is a self number, because there is not a number n which added to its sum of digits gives 249049403648.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65485715 + ... + 65489517.

It is an arithmetic number, because the mean of its divisors is an integer number (6933691548).

Almost surely, 2^249049403648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249049403648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249612895728).

249049403648 is an abundant number, since it is smaller than the sum of its proper divisors (250176387808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249049403648 is an equidigital number, since it uses as much as digits as its factorization.

With its successor (249049403649) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (4817).

249049403648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831 (or 4817 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 53.

The spelling of 249049403648 in words is "two hundred forty-nine billion, forty-nine million, four hundred three thousand, six hundred forty-eight".