636136307842 has 8 divisors (see below), whose sum is σ = 1090519384896. Its totient is φ = 272629846212.

The previous prime is 636136307839. The next prime is 636136307929. The reversal of 636136307842 is 248703631636.

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

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, 22719153838 + ... + 22719153865.

It is an arithmetic number, because the mean of its divisors is an integer number (136314923112).

Almost surely, 2^636136307842 is an apocalyptic number.

636136307842 is a deficient number, since it is larger than the sum of its proper divisors (454383077054).

636136307842 is a wasteful number, since it uses less digits than its factorization.

636136307842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45438307712.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 636136307842 in words is "six hundred thirty-six billion, one hundred thirty-six million, three hundred seven thousand, eight hundred forty-two".