6401983511 has 16 divisors (see below), whose sum is σ = 8071384320. Its totient is φ = 4932502080.

The previous prime is 6401983487. The next prime is 6401983517. The reversal of 6401983511 is 1153891046.

It is not a de Polignac number, because 6401983511 - 2¹⁴ = 6401967127 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 (6401983517) 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 in 15 ways as a sum of consecutive naturals, for example, 460241 + ... + 473946.

It is an arithmetic number, because the mean of its divisors is an integer number (504461520).

Almost surely, 2^6401983511 is an apocalyptic number.

6401983511 is a deficient number, since it is larger than the sum of its proper divisors (1669400809).

6401983511 is a wasteful number, since it uses less digits than its factorization.

6401983511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934294.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 6401983511 is about 80012.3959833725. The cubic root of 6401983511 is about 1856.8273186858.

The spelling of 6401983511 in words is "six billion, four hundred one million, nine hundred eighty-three thousand, five hundred eleven".