636155464242 has 16 divisors (see below), whose sum is σ = 1282023227232. Its totient is φ = 210433104960.

The previous prime is 636155464207. The next prime is 636155464249. The reversal of 636155464242 is 242464551636.

It is a junction number, because it is equal to n+sod(n) for n = 636155464191 and 636155464200.

It is not an unprimeable number, because it can be changed into a prime (636155464249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404678263 + ... + 404679834.

It is an arithmetic number, because the mean of its divisors is an integer number (80126451702).

Almost surely, 2^636155464242 is an apocalyptic number.

636155464242 is an abundant number, since it is smaller than the sum of its proper divisors (645867762990).

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

636155464242 is a wasteful number, since it uses less digits than its factorization.

636155464242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809358233.

The product of its digits is 4147200, while the sum is 48.

The spelling of 636155464242 in words is "six hundred thirty-six billion, one hundred fifty-five million, four hundred sixty-four thousand, two hundred forty-two".