6401983487 has 2 divisors, whose sum is σ = 6401983488. Its totient is φ = 6401983486.

The previous prime is 6401983463. The next prime is 6401983517. The reversal of 6401983487 is 7843891046.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6401983487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401983087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200991743 + 3200991744.

It is an arithmetic number, because the mean of its divisors is an integer number (3200991744).

Almost surely, 2^6401983487 is an apocalyptic number.

6401983487 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401983487 is an equidigital number, since it uses as much as digits as its factorization.

6401983487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 6401983487 is about 80012.3958333957. The cubic root of 6401983487 is about 1856.8273163655.

The spelling of 6401983487 in words is "six billion, four hundred one million, nine hundred eighty-three thousand, four hundred eighty-seven".