636776142 has 32 divisors (see below), whose sum is σ = 1353088800. Its totient is φ = 199398528.

The previous prime is 636776141. The next prime is 636776149. The reversal of 636776142 is 241677636.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 636776094 and 636776103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636776141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43017 + ... + 55892.

It is an arithmetic number, because the mean of its divisors is an integer number (42284025).

Almost surely, 2^636776142 is an apocalyptic number.

636776142 is an abundant number, since it is smaller than the sum of its proper divisors (716312658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636776142 is a wasteful number, since it uses less digits than its factorization.

636776142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98980.

The product of its digits is 254016, while the sum is 42.

The square root of 636776142 is about 25234.4237501077. The cubic root of 636776142 is about 860.3244413149.

The spelling of 636776142 in words is "six hundred thirty-six million, seven hundred seventy-six thousand, one hundred forty-two".