249798897942 has 96 divisors (see below), whose sum is σ = 593671142400. Its totient is φ = 69774281280.

The previous prime is 249798897913. The next prime is 249798897989.

249798897942 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 265659 + ... + 755097.

It is an arithmetic number, because the mean of its divisors is an integer number (6184074400).

Almost surely, 2^249798897942 is an apocalyptic number.

249798897942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 249798897942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296835571200).

249798897942 is an abundant number, since it is smaller than the sum of its proper divisors (343872244458).

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

249798897942 is a wasteful number, since it uses less digits than its factorization.

249798897942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489522 (or 489511 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 78.

The spelling of 249798897942 in words is "two hundred forty-nine billion, seven hundred ninety-eight million, eight hundred ninety-seven thousand, nine hundred forty-two".