254443013636 has 18 divisors (see below), whose sum is σ = 517973278158. Its totient is φ = 109047005760.

The previous prime is 254443013623. The next prime is 254443013647. The reversal of 254443013636 is 636310344452.

It can be written as a sum of positive squares in only one way, i.e., 254072451136 + 370562500 = 504056^2 + 19250^2 .

It is a super-3 number, since 3×254443013636³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 254443013593 and 254443013602.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 649089125 + ... + 649089516.

It is an arithmetic number, because the mean of its divisors is an integer number (28776293231).

Almost surely, 2^254443013636 is an apocalyptic number.

It is an amenable number.

254443013636 is an abundant number, since it is smaller than the sum of its proper divisors (263530264522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

254443013636 is a wasteful number, since it uses less digits than its factorization.

254443013636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298178659 (or 1298178650 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 254443013636 in words is "two hundred fifty-four billion, four hundred forty-three million, thirteen thousand, six hundred thirty-six".