251065556216 has 16 divisors (see below), whose sum is σ = 475318287600. Its totient is φ = 124314012864.

The previous prime is 251065556213. The next prime is 251065556219. The reversal of 251065556216 is 612655560152.

It is an interprime number because it is at equal distance from previous prime (251065556213) and next prime (251065556219).

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251065556213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152344781 + ... + 152346428.

It is an arithmetic number, because the mean of its divisors is an integer number (29707392975).

Almost surely, 2^251065556216 is an apocalyptic number.

It is an amenable number.

251065556216 is a deficient number, since it is larger than the sum of its proper divisors (224252731384).

251065556216 is a wasteful number, since it uses less digits than its factorization.

251065556216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304691318 (or 304691314 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 251065556216 in words is "two hundred fifty-one billion, sixty-five million, five hundred fifty-six thousand, two hundred sixteen".