6461251799 has 4 divisors (see below), whose sum is σ = 6635880264. Its totient is φ = 6286623336.

The previous prime is 6461251757. The next prime is 6461251807. The reversal of 6461251799 is 9971521646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6461251799 - 2²⁴ = 6444474583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461251099) 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, 87314177 + ... + 87314250.

It is an arithmetic number, because the mean of its divisors is an integer number (1658970066).

Almost surely, 2^6461251799 is an apocalyptic number.

6461251799 is a deficient number, since it is larger than the sum of its proper divisors (174628465).

6461251799 is a wasteful number, since it uses less digits than its factorization.

6461251799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174628464.

The product of its digits is 816480, while the sum is 50.

The square root of 6461251799 is about 80381.9121382416. The cubic root of 6461251799 is about 1862.5397723381.

The spelling of 6461251799 in words is "six billion, four hundred sixty-one million, two hundred fifty-one thousand, seven hundred ninety-nine".