249951366722 has 18 divisors (see below), whose sum is σ = 376228609497. Its totient is φ = 124543329624.

The previous prime is 249951366697. The next prime is 249951366733. The reversal of 249951366722 is 227663159942.

It can be written as a sum of positive squares in 2 ways, for example, as 246433809241 + 3517557481 = 496421^2 + 59309^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=353519.

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, 330186368 + ... + 330187124.

Almost surely, 2^249951366722 is an apocalyptic number.

249951366722 is a deficient number, since it is larger than the sum of its proper divisors (126277242775).

249951366722 is an frugal number, since it uses more digits than its factorization.

249951366722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450 (or 1226 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 56.

The spelling of 249951366722 in words is "two hundred forty-nine billion, nine hundred fifty-one million, three hundred sixty-six thousand, seven hundred twenty-two".