249787787942 has 96 divisors (see below), whose sum is σ = 502341419520. Its totient is φ = 91964281920.

The previous prime is 249787787933. The next prime is 249787787959.

249787787942 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 249787787942.

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, 1384313 + ... + 1554315.

It is an arithmetic number, because the mean of its divisors is an integer number (5232723120).

Almost surely, 2^249787787942 is an apocalyptic number.

249787787942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

249787787942 is an abundant number, since it is smaller than the sum of its proper divisors (252553631578).

249787787942 is a wasteful number, since it uses less digits than its factorization.

249787787942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170106 (or 170099 counting only the distinct ones).

The product of its digits is 796594176, while the sum is 74.

The spelling of 249787787942 in words is "two hundred forty-nine billion, seven hundred eighty-seven million, seven hundred eighty-seven thousand, nine hundred forty-two".