253681366 has 16 divisors (see below), whose sum is σ = 385786800. Its totient is φ = 125091328.

The previous prime is 253681333. The next prime is 253681387. The reversal of 253681366 is 663186352.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 133350 + ... + 135238.

It is an arithmetic number, because the mean of its divisors is an integer number (24111675).

Almost surely, 2^253681366 is an apocalyptic number.

253681366 is a deficient number, since it is larger than the sum of its proper divisors (132105434).

253681366 is a wasteful number, since it uses less digits than its factorization.

253681366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

The product of its digits is 155520, while the sum is 40.

The square root of 253681366 is about 15927.3778758464. The cubic root of 253681366 is about 633.0376237862.

The spelling of 253681366 in words is "two hundred fifty-three million, six hundred eighty-one thousand, three hundred sixty-six".