636431742446 has 8 divisors (see below), whose sum is σ = 958928545344. Its totient is φ = 316788894000.

The previous prime is 636431742403. The next prime is 636431742461. The reversal of 636431742446 is 644247134636.

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

It is a junction number, because it is equal to n+sod(n) for n = 636431742394 and 636431742403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713488055 + ... + 713488946.

It is an arithmetic number, because the mean of its divisors is an integer number (119866068168).

Almost surely, 2^636431742446 is an apocalyptic number.

636431742446 is a deficient number, since it is larger than the sum of its proper divisors (322496802898).

636431742446 is a wasteful number, since it uses less digits than its factorization.

636431742446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426977226.

The product of its digits is 6967296, while the sum is 50.

The spelling of 636431742446 in words is "six hundred thirty-six billion, four hundred thirty-one million, seven hundred forty-two thousand, four hundred forty-six".