2451643021117 has 2 divisors, whose sum is σ = 2451643021118. Its totient is φ = 2451643021116.

The previous prime is 2451643021099. The next prime is 2451643021151. The reversal of 2451643021117 is 7111203461542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2443425417316 + 8217603801 = 1563146^2 + 90651^2 .

It is a cyclic number.

It is not a de Polignac number, because 2451643021117 - 2⁷ = 2451643020989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2451643061117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1225821510558 + 1225821510559.

It is an arithmetic number, because the mean of its divisors is an integer number (1225821510559).

Almost surely, 2^{2451643021117} is an apocalyptic number.

It is an amenable number.

2451643021117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2451643021117 is an equidigital number, since it uses as much as digits as its factorization.

2451643021117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

Adding to 2451643021117 its reverse (7111203461542), we get a palindrome (9562846482659).

The spelling of 2451643021117 in words is "two trillion, four hundred fifty-one billion, six hundred forty-three million, twenty-one thousand, one hundred seventeen".