6461719258 has 8 divisors (see below), whose sum is σ = 9763328052. Its totient is φ = 3207276576.

The previous prime is 6461719247. The next prime is 6461719259. The reversal of 6461719258 is 8529171646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5880282489 + 581436769 = 76683^2 + 24113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6461719259) 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, 11791185 + ... + 11791732.

Almost surely, 2^6461719258 is an apocalyptic number.

6461719258 is a deficient number, since it is larger than the sum of its proper divisors (3301608794).

6461719258 is a wasteful number, since it uses less digits than its factorization.

6461719258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23583056.

The product of its digits is 725760, while the sum is 49.

The square root of 6461719258 is about 80384.8198231482. The cubic root of 6461719258 is about 1862.5846882981.

The spelling of 6461719258 in words is "six billion, four hundred sixty-one million, seven hundred nineteen thousand, two hundred fifty-eight".