249394988738 has 8 divisors (see below), whose sum is σ = 427534266432. Its totient is φ = 106883566596.

The previous prime is 249394988707. The next prime is 249394988753. The reversal of 249394988738 is 837889493942.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8906963870 + ... + 8906963897.

It is an arithmetic number, because the mean of its divisors is an integer number (53441783304).

Almost surely, 2^249394988738 is an apocalyptic number.

249394988738 is a deficient number, since it is larger than the sum of its proper divisors (178139277694).

249394988738 is a wasteful number, since it uses less digits than its factorization.

249394988738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17813927776.

The product of its digits is 752467968, while the sum is 74.

The spelling of 249394988738 in words is "two hundred forty-nine billion, three hundred ninety-four million, nine hundred eighty-eight thousand, seven hundred thirty-eight".