263849280442 has 32 divisors (see below), whose sum is σ = 432869754240. Its totient is φ = 119621686080.

The previous prime is 263849280439. The next prime is 263849280547. The reversal of 263849280442 is 244082948362.

It is a super-2 number, since 2×263849280442² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 263849280442.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20676328 + ... + 20689084.

It is an arithmetic number, because the mean of its divisors is an integer number (13527179820).

Almost surely, 2^263849280442 is an apocalyptic number.

263849280442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

263849280442 is a deficient number, since it is larger than the sum of its proper divisors (169020473798).

263849280442 is a wasteful number, since it uses less digits than its factorization.

263849280442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15126.

The product of its (nonzero) digits is 5308416, while the sum is 52.

The spelling of 263849280442 in words is "two hundred sixty-three billion, eight hundred forty-nine million, two hundred eighty thousand, four hundred forty-two".