249980780078 has 16 divisors (see below), whose sum is σ = 394747242000. Its totient is φ = 118399724352.

The previous prime is 249980780069. The next prime is 249980780117. The reversal of 249980780078 is 870087089942.

It is a self number, because there is not a number n which added to its sum of digits gives 249980780078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38858 + ... + 708146.

It is an arithmetic number, because the mean of its divisors is an integer number (24671702625).

Almost surely, 2^249980780078 is an apocalyptic number.

249980780078 is a deficient number, since it is larger than the sum of its proper divisors (144766461922).

249980780078 is a wasteful number, since it uses less digits than its factorization.

249980780078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679139.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 249980780078 in words is "two hundred forty-nine billion, nine hundred eighty million, seven hundred eighty thousand, seventy-eight".