253666436 has 6 divisors (see below), whose sum is σ = 443916270. Its totient is φ = 126833216.

The previous prime is 253666423. The next prime is 253666463. The reversal of 253666436 is 634666352.

It can be written as a sum of positive squares in only one way, i.e., 237344836 + 16321600 = 15406^2 + 4040^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253666393 and 253666402.

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 as a sum of consecutive naturals, namely, 31708301 + ... + 31708308.

It is an arithmetic number, because the mean of its divisors is an integer number (73986045).

Almost surely, 2^253666436 is an apocalyptic number.

It is an amenable number.

253666436 is a deficient number, since it is larger than the sum of its proper divisors (190249834).

253666436 is a wasteful number, since it uses less digits than its factorization.

253666436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63416613 (or 63416611 counting only the distinct ones).

The product of its digits is 466560, while the sum is 41.

The square root of 253666436 is about 15926.9091791220. The cubic root of 253666436 is about 633.0252047461.

The spelling of 253666436 in words is "two hundred fifty-three million, six hundred sixty-six thousand, four hundred thirty-six".