636766054745 has 4 divisors (see below), whose sum is σ = 764119265700. Its totient is φ = 509412843792.

The previous prime is 636766054679. The next prime is 636766054817. The reversal of 636766054745 is 547450667636.

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

It can be written as a sum of positive squares in 2 ways, for example, as 375533644864 + 261232409881 = 612808^2 + 511109^2 .

It is a cyclic number.

It is not a de Polignac number, because 636766054745 - 2³⁸ = 361888147801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63676605470 + ... + 63676605479.

It is an arithmetic number, because the mean of its divisors is an integer number (191029816425).

Almost surely, 2^636766054745 is an apocalyptic number.

It is an amenable number.

636766054745 is a deficient number, since it is larger than the sum of its proper divisors (127353210955).

636766054745 is a wasteful number, since it uses less digits than its factorization.

636766054745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127353210954.

The product of its (nonzero) digits is 76204800, while the sum is 59.

The spelling of 636766054745 in words is "six hundred thirty-six billion, seven hundred sixty-six million, fifty-four thousand, seven hundred forty-five".