6488899525 has 6 divisors (see below), whose sum is σ = 8046235442. Its totient is φ = 5191119600.

The previous prime is 6488899493. The next prime is 6488899537. The reversal of 6488899525 is 5259988846.

It can be written as a sum of positive squares in 3 ways, for example, as 1158585444 + 5330314081 = 34038^2 + 73009^2 .

It is not a de Polignac number, because 6488899525 - 2⁵ = 6488899493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 129777966 + ... + 129778015.

Almost surely, 2^6488899525 is an apocalyptic number.

It is an amenable number.

6488899525 is a deficient number, since it is larger than the sum of its proper divisors (1557335917).

6488899525 is a wasteful number, since it uses less digits than its factorization.

6488899525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259555991 (or 259555986 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 64.

The square root of 6488899525 is about 80553.7058427482. The cubic root of 6488899525 is about 1865.1925975129.

The spelling of 6488899525 in words is "six billion, four hundred eighty-eight million, eight hundred ninety-nine thousand, five hundred twenty-five".