16251241637 has 2 divisors, whose sum is σ = 16251241638. Its totient is φ = 16251241636.

The previous prime is 16251241621. The next prime is 16251241661. The reversal of 16251241637 is 73614215261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12626117956 + 3625123681 = 112366^2 + 60209^2 .

It is a cyclic number.

It is not a de Polignac number, because 16251241637 - 2⁴ = 16251241621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16251241637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16251241687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8125620818 + 8125620819.

It is an arithmetic number, because the mean of its divisors is an integer number (8125620819).

Almost surely, 2^16251241637 is an apocalyptic number.

It is an amenable number.

16251241637 is a deficient number, since it is larger than the sum of its proper divisors (1).

16251241637 is an equidigital number, since it uses as much as digits as its factorization.

16251241637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

Adding to 16251241637 its reverse (73614215261), we get a palindrome (89865456898).

The spelling of 16251241637 in words is "sixteen billion, two hundred fifty-one million, two hundred forty-one thousand, six hundred thirty-seven".