636405247346 has 8 divisors (see below), whose sum is σ = 1041390404784. Its totient is φ = 289275112420.

The previous prime is 636405247321. The next prime is 636405247397. The reversal of 636405247346 is 643742504636.

636405247346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 636405247294 and 636405247303.

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, 14463755600 + ... + 14463755643.

It is an arithmetic number, because the mean of its divisors is an integer number (130173800598).

Almost surely, 2^636405247346 is an apocalyptic number.

636405247346 is a deficient number, since it is larger than the sum of its proper divisors (404985157438).

636405247346 is a wasteful number, since it uses less digits than its factorization.

636405247346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28927511256.

The product of its (nonzero) digits is 8709120, while the sum is 50.

The spelling of 636405247346 in words is "six hundred thirty-six billion, four hundred five million, two hundred forty-seven thousand, three hundred forty-six".