249788019999 has 32 divisors (see below), whose sum is σ = 384243143680. Its totient is φ = 141381676800.

The previous prime is 249788019983. The next prime is 249788020007. The reversal of 249788019999 is 999910887942.

249788019999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 249788019999 - 2⁴ = 249788019983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249788019999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249788019919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8021139 + ... + 8052219.

It is an arithmetic number, because the mean of its divisors is an integer number (12007598240).

Almost surely, 2^249788019999 is an apocalyptic number.

249788019999 is a deficient number, since it is larger than the sum of its proper divisors (134455123681).

249788019999 is a wasteful number, since it uses less digits than its factorization.

249788019999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34711.

The product of its (nonzero) digits is 211631616, while the sum is 75.

The spelling of 249788019999 in words is "two hundred forty-nine billion, seven hundred eighty-eight million, nineteen thousand, nine hundred ninety-nine".