249938963820 has 1080 divisors, whose sum is σ = 1021191228288. Its totient is φ = 50948352000.

The previous prime is 249938963809. The next prime is 249938963821. The reversal of 249938963820 is 28369839942.

249938963820 is a `hidden beast` number, since 2 + 499 + 3 + 8 + 9 + 63 + 82 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (249938963821) by changing a digit.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 415871520 + ... + 415872120.

Almost surely, 2^249938963820 is an apocalyptic number.

249938963820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249938963820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510595614144).

249938963820 is an abundant number, since it is smaller than the sum of its proper divisors (771252264468).

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

249938963820 is a wasteful number, since it uses less digits than its factorization.

249938963820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 63.

The spelling of 249938963820 in words is "two hundred forty-nine billion, nine hundred thirty-eight million, nine hundred sixty-three thousand, eight hundred twenty".