249428021712 has 40 divisors (see below), whose sum is σ = 644656667904. Its totient is φ = 83103842304.

The previous prime is 249428021701. The next prime is 249428021719. The reversal of 249428021712 is 217120824942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249428021719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109553 + ... + 1315280.

Almost surely, 2^249428021712 is an apocalyptic number.

It is an amenable number.

249428021712 is an abundant number, since it is smaller than the sum of its proper divisors (395228646192).

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

249428021712 is a wasteful number, since it uses less digits than its factorization.

249428021712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426987 (or 2426981 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 249428021712 in words is "two hundred forty-nine billion, four hundred twenty-eight million, twenty-one thousand, seven hundred twelve".