253381778 has 16 divisors (see below), whose sum is σ = 413138880. Its totient is φ = 115851216.

The previous prime is 253381741. The next prime is 253381837. The reversal of 253381778 is 877183352.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 42758 + ... + 48321.

It is an arithmetic number, because the mean of its divisors is an integer number (25821180).

Almost surely, 2^253381778 is an apocalyptic number.

253381778 is a deficient number, since it is larger than the sum of its proper divisors (159757102).

253381778 is a wasteful number, since it uses less digits than its factorization.

253381778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91201.

The product of its digits is 282240, while the sum is 44.

The square root of 253381778 is about 15917.9702851840. The cubic root of 253381778 is about 632.7883278758.

The spelling of 253381778 in words is "two hundred fifty-three million, three hundred eighty-one thousand, seven hundred seventy-eight".