249238580644 has 27 divisors (see below), whose sum is σ = 455997850273. Its totient is φ = 119190077072.

The previous prime is 249238580599. The next prime is 249238580653. The reversal of 249238580644 is 446085832942.

The square root of 249238580644 is 499238.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 134241632100 + 114996948544 = 366390^2 + 339112^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22959522 + ... + 22970374.

Almost surely, 2^249238580644 is an apocalyptic number.

249238580644 is the 499238-th square number.

It is an amenable number.

249238580644 is a deficient number, since it is larger than the sum of its proper divisors (206759269629).

249238580644 is an frugal number, since it uses more digits than its factorization.

249238580644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21756 (or 10878 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 55.

The spelling of 249238580644 in words is "two hundred forty-nine billion, two hundred thirty-eight million, five hundred eighty thousand, six hundred forty-four".