6498642961 has 4 divisors (see below), whose sum is σ = 6498911232. Its totient is φ = 6498374692.

The previous prime is 6498642929. The next prime is 6498642971. The reversal of 6498642961 is 1692468946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6498642961 - 2⁵ = 6498642929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6498642901) 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, 93745 + ... + 147598.

It is an arithmetic number, because the mean of its divisors is an integer number (1624727808).

Almost surely, 2^6498642961 is an apocalyptic number.

It is an amenable number.

6498642961 is a deficient number, since it is larger than the sum of its proper divisors (268271).

6498642961 is a wasteful number, since it uses less digits than its factorization.

6498642961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268270.

The product of its digits is 4478976, while the sum is 55.

The square root of 6498642961 is about 80614.1610450670. The cubic root of 6498642961 is about 1866.1256933896.

The spelling of 6498642961 in words is "six billion, four hundred ninety-eight million, six hundred forty-two thousand, nine hundred sixty-one".