253680718 has 4 divisors (see below), whose sum is σ = 380521080. Its totient is φ = 126840358.

The previous prime is 253680709. The next prime is 253680727. The reversal of 253680718 is 817086352.

253680718 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (253680709) and next prime (253680727).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63420178 + ... + 63420181.

It is an arithmetic number, because the mean of its divisors is an integer number (95130270).

Almost surely, 2^253680718 is an apocalyptic number.

253680718 is a deficient number, since it is larger than the sum of its proper divisors (126840362).

253680718 is a wasteful number, since it uses less digits than its factorization.

253680718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126840361.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 253680718 is about 15927.3575335019. The cubic root of 253680718 is about 633.0370847784.

The spelling of 253680718 in words is "two hundred fifty-three million, six hundred eighty thousand, seven hundred eighteen".