251630020716085 has 32 divisors (see below), whose sum is σ = 340080707119104. Its totient is φ = 177125367744000.

The previous prime is 251630020716083. The next prime is 251630020716091. The reversal of 251630020716085 is 580617020036152.

It is not a de Polignac number, because 251630020716085 - 2¹ = 251630020716083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251630020716083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323305336 + ... + 324082705.

It is an arithmetic number, because the mean of its divisors is an integer number (10627522097472).

Almost surely, 2^{251630020716085} is an apocalyptic number.

It is an amenable number.

251630020716085 is a deficient number, since it is larger than the sum of its proper divisors (88450686403019).

251630020716085 is a wasteful number, since it uses less digits than its factorization.

251630020716085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647388285.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 251630020716085 in words is "two hundred fifty-one trillion, six hundred thirty billion, twenty million, seven hundred sixteen thousand, eighty-five".