6988464557 has 2 divisors, whose sum is σ = 6988464558. Its totient is φ = 6988464556.

The previous prime is 6988464551. The next prime is 6988464559. The reversal of 6988464557 is 7554648896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6953725321 + 34739236 = 83389^2 + 5894^2 .

It is a cyclic number.

It is not a de Polignac number, because 6988464557 - 2¹⁰ = 6988463533 is a prime.

Together with 6988464559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6988464557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6988464551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494232278 + 3494232279.

It is an arithmetic number, because the mean of its divisors is an integer number (3494232279).

Almost surely, 2^6988464557 is an apocalyptic number.

It is an amenable number.

6988464557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988464557 is an equidigital number, since it uses as much as digits as its factorization.

6988464557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58060800, while the sum is 62.

The square root of 6988464557 is about 83597.0367716464. The cubic root of 6988464557 is about 1911.8798189146.

The spelling of 6988464557 in words is "six billion, nine hundred eighty-eight million, four hundred sixty-four thousand, five hundred fifty-seven".