636346377346 has 4 divisors (see below), whose sum is σ = 954519566022. Its totient is φ = 318173188672.

The previous prime is 636346377319. The next prime is 636346377353. The reversal of 636346377346 is 643773643636.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 525174146721 + 111172230625 = 724689^2 + 333425^2 .

It is a super-2 number, since 2×636346377346² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159086594335 + ... + 159086594338.

Almost surely, 2^636346377346 is an apocalyptic number.

636346377346 is a deficient number, since it is larger than the sum of its proper divisors (318173188676).

636346377346 is a wasteful number, since it uses less digits than its factorization.

636346377346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318173188675.

The product of its digits is 82301184, while the sum is 58.

The spelling of 636346377346 in words is "six hundred thirty-six billion, three hundred forty-six million, three hundred seventy-seven thousand, three hundred forty-six".