6401983517 has 2 divisors, whose sum is σ = 6401983518. Its totient is φ = 6401983516.

The previous prime is 6401983487. The next prime is 6401983561. The reversal of 6401983517 is 7153891046.

It is an a-pointer prime, because the next prime (6401983561) can be obtained adding 6401983517 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3469327801 + 2932655716 = 58901^2 + 54154^2 .

It is a cyclic number.

It is not a de Polignac number, because 6401983517 - 2¹⁴ = 6401967133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401983717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200991758 + 3200991759.

It is an arithmetic number, because the mean of its divisors is an integer number (3200991759).

Almost surely, 2^6401983517 is an apocalyptic number.

It is an amenable number.

6401983517 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401983517 is an equidigital number, since it uses as much as digits as its factorization.

6401983517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 6401983517 is about 80012.3960208667. The cubic root of 6401983517 is about 1856.8273192659.

The spelling of 6401983517 in words is "six billion, four hundred one million, nine hundred eighty-three thousand, five hundred seventeen".