6351998637 has 8 divisors (see below), whose sum is σ = 8475190336. Its totient is φ = 4231736352.

The previous prime is 6351998621. The next prime is 6351998641. The reversal of 6351998637 is 7368991536.

It is a happy number.

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

It is not a de Polignac number, because 6351998637 - 2⁴ = 6351998621 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 (6351998617) 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, 727288 + ... + 735969.

It is an arithmetic number, because the mean of its divisors is an integer number (1059398792).

Almost surely, 2^6351998637 is an apocalyptic number.

It is an amenable number.

6351998637 is a deficient number, since it is larger than the sum of its proper divisors (2123191699).

6351998637 is a wasteful number, since it uses less digits than its factorization.

6351998637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464707.

The product of its digits is 7348320, while the sum is 57.

The square root of 6351998637 is about 79699.4268298085. The cubic root of 6351998637 is about 1851.9821595815.

The spelling of 6351998637 in words is "six billion, three hundred fifty-one million, nine hundred ninety-eight thousand, six hundred thirty-seven".