636378149434 has 32 divisors (see below), whose sum is σ = 961554306816. Its totient is φ = 315870762240.

The previous prime is 636378149401. The next prime is 636378149441. The reversal of 636378149434 is 434941873636.

636378149434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234564862 + ... + 234567574.

It is an arithmetic number, because the mean of its divisors is an integer number (30048572088).

Almost surely, 2^636378149434 is an apocalyptic number.

636378149434 is a deficient number, since it is larger than the sum of its proper divisors (325176157382).

636378149434 is a wasteful number, since it uses less digits than its factorization.

636378149434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390.

The product of its digits is 31352832, while the sum is 58.

The spelling of 636378149434 in words is "six hundred thirty-six billion, three hundred seventy-eight million, one hundred forty-nine thousand, four hundred thirty-four".