636345054545126 has 4 divisors (see below), whose sum is σ = 954517581817692. Its totient is φ = 318172527272562.

The previous prime is 636345054545117. The next prime is 636345054545131. The reversal of 636345054545126 is 621545450543636.

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

It is a super-2 number, since 2×636345054545126² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159086263636280 + ... + 159086263636283.

It is an arithmetic number, because the mean of its divisors is an integer number (238629395454423).

Almost surely, 2^{636345054545126} is an apocalyptic number.

636345054545126 is a deficient number, since it is larger than the sum of its proper divisors (318172527272566).

636345054545126 is a wasteful number, since it uses less digits than its factorization.

636345054545126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318172527272565.

The product of its (nonzero) digits is 155520000, while the sum is 59.

The spelling of 636345054545126 in words is "six hundred thirty-six trillion, three hundred forty-five billion, fifty-four million, five hundred forty-five thousand, one hundred twenty-six".