6463191561 has 8 divisors (see below), whose sum is σ = 8850496704. Its totient is φ = 4192340400.

The previous prime is 6463191533. The next prime is 6463191569. The reversal of 6463191561 is 1651913646.

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

It is not a de Polignac number, because 6463191561 - 2⁷ = 6463191433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6463191569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29113365 + ... + 29113586.

It is an arithmetic number, because the mean of its divisors is an integer number (1106312088).

Almost surely, 2^6463191561 is an apocalyptic number.

It is an amenable number.

6463191561 is a deficient number, since it is larger than the sum of its proper divisors (2387305143).

6463191561 is a wasteful number, since it uses less digits than its factorization.

6463191561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58226991.

The product of its digits is 116640, while the sum is 42.

The square root of 6463191561 is about 80393.9771438135. The cubic root of 6463191561 is about 1862.7261408881.

The spelling of 6463191561 in words is "six billion, four hundred sixty-three million, one hundred ninety-one thousand, five hundred sixty-one".