253956778 has 8 divisors (see below), whose sum is σ = 403343172. Its totient is φ = 119509056.

The previous prime is 253956739. The next prime is 253956779. The reversal of 253956778 is 877659352.

It can be written as a sum of positive squares in 2 ways, for example, as 247024089 + 6932689 = 15717^2 + 2633^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (253956779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3734625 + ... + 3734692.

Almost surely, 2^253956778 is an apocalyptic number.

253956778 is a deficient number, since it is larger than the sum of its proper divisors (149386394).

253956778 is a wasteful number, since it uses less digits than its factorization.

253956778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7469336.

The product of its digits is 3175200, while the sum is 52.

The square root of 253956778 is about 15936.0213980780. The cubic root of 253956778 is about 633.2666290474.

The spelling of 253956778 in words is "two hundred fifty-three million, nine hundred fifty-six thousand, seven hundred seventy-eight".