249777777942 has 96 divisors (see below), whose sum is σ = 674829702144. Its totient is φ = 64867219200.

The previous prime is 249777777937. The next prime is 249777777967.

It is a happy number.

249777777942 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13672078 + ... + 13690334.

It is an arithmetic number, because the mean of its divisors is an integer number (7029476064).

Almost surely, 2^249777777942 is an apocalyptic number.

249777777942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

249777777942 is an abundant number, since it is smaller than the sum of its proper divisors (425051924202).

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

249777777942 is a wasteful number, since it uses less digits than its factorization.

249777777942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28154 (or 28151 counting only the distinct ones).

The product of its digits is 609892416, while the sum is 72.

The spelling of 249777777942 in words is "two hundred forty-nine billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, nine hundred forty-two".