6488490961 has 4 divisors (see below), whose sum is σ = 6489530932. Its totient is φ = 6487450992.

The previous prime is 6488490919. The next prime is 6488490979. The reversal of 6488490961 is 1690948846.

6488490961 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1690948846 = 2 ⋅845474423.

It can be written as a sum of positive squares in 2 ways, for example, as 4886010000 + 1602480961 = 69900^2 + 40031^2 .

It is a cyclic number.

It is not a de Polignac number, because 6488490961 - 2²³ = 6480102353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6488490361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510570 + ... + 523123.

It is an arithmetic number, because the mean of its divisors is an integer number (1622382733).

Almost surely, 2^6488490961 is an apocalyptic number.

It is an amenable number.

6488490961 is a deficient number, since it is larger than the sum of its proper divisors (1039971).

6488490961 is a wasteful number, since it uses less digits than its factorization.

6488490961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039970.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 6488490961 is about 80551.1698301148. The cubic root of 6488490961 is about 1865.1534503232.

The spelling of 6488490961 in words is "six billion, four hundred eighty-eight million, four hundred ninety thousand, nine hundred sixty-one".