249678299728 has 160 divisors (see below), whose sum is σ = 574043258880. Its totient is φ = 103709652480.

The previous prime is 249678299693. The next prime is 249678299803. The reversal of 249678299728 is 827992876942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240305833 + ... + 240306871.

It is an arithmetic number, because the mean of its divisors is an integer number (3587770368).

Almost surely, 2^249678299728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249678299728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287021629440).

249678299728 is an abundant number, since it is smaller than the sum of its proper divisors (324364959152).

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

249678299728 is a wasteful number, since it uses less digits than its factorization.

249678299728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025 (or 2019 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 73.

The spelling of 249678299728 in words is "two hundred forty-nine billion, six hundred seventy-eight million, two hundred ninety-nine thousand, seven hundred twenty-eight".