251250067606 has 4 divisors (see below), whose sum is σ = 376875101412. Its totient is φ = 125625033802.

The previous prime is 251250067583. The next prime is 251250067619. The reversal of 251250067606 is 606760052152.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62812516900 + ... + 62812516903.

It is an arithmetic number, because the mean of its divisors is an integer number (94218775353).

Almost surely, 2^251250067606 is an apocalyptic number.

251250067606 is a deficient number, since it is larger than the sum of its proper divisors (125625033806).

251250067606 is a wasteful number, since it uses less digits than its factorization.

251250067606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125625033805.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 251250067606 in words is "two hundred fifty-one billion, two hundred fifty million, sixty-seven thousand, six hundred six".