2251144638 has 12 divisors (see below), whose sum is σ = 4877480088. Its totient is φ = 750381540.

The previous prime is 2251144613. The next prime is 2251144667. The reversal of 2251144638 is 8364411522.

It is a happy number.

2251144638 is a `hidden beast` number, since 2 + 2 + 5 + 1 + 14 + 4 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62531778 + ... + 62531813.

It is an arithmetic number, because the mean of its divisors is an integer number (406456674).

Almost surely, 2^2251144638 is an apocalyptic number.

2251144638 is an abundant number, since it is smaller than the sum of its proper divisors (2626335450).

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

2251144638 is a wasteful number, since it uses less digits than its factorization.

2251144638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125063599 (or 125063596 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 2251144638 is about 47446.2289123172. The cubic root of 2251144638 is about 1310.5928668554.

The spelling of 2251144638 in words is "two billion, two hundred fifty-one million, one hundred forty-four thousand, six hundred thirty-eight".