249969481398 has 192 divisors, whose sum is σ = 689317085184. Its totient is φ = 63685440000.

The previous prime is 249969481393. The next prime is 249969481403. The reversal of 249969481398 is 893184969942.

249969481398 is a `hidden beast` number, since 2 + 499 + 6 + 9 + 48 + 1 + 3 + 98 = 666.

It is an interprime number because it is at equal distance from previous prime (249969481393) and next prime (249969481403).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249969481393) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30513483 + ... + 30521673.

It is an arithmetic number, because the mean of its divisors is an integer number (3590193152).

Almost surely, 2^249969481398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249969481398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344658542592).

249969481398 is an abundant number, since it is smaller than the sum of its proper divisors (439347603786).

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

249969481398 is a wasteful number, since it uses less digits than its factorization.

249969481398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8851 (or 8848 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 72.

The spelling of 249969481398 in words is "two hundred forty-nine billion, nine hundred sixty-nine million, four hundred eighty-one thousand, three hundred ninety-eight".