639310133545 has 8 divisors (see below), whose sum is σ = 767228367240. Its totient is φ = 511410635520.

The previous prime is 639310133533. The next prime is 639310133591. The reversal of 639310133545 is 545331013936.

It can be written as a sum of positive squares in 4 ways, for example, as 196755232041 + 442554901504 = 443571^2 + 665248^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 639310133545 - 2¹¹ = 639310131497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4608736 + ... + 4745425.

It is an arithmetic number, because the mean of its divisors is an integer number (95903545905).

Almost surely, 2^639310133545 is an apocalyptic number.

It is an amenable number.

639310133545 is a deficient number, since it is larger than the sum of its proper divisors (127918233695).

639310133545 is a wasteful number, since it uses less digits than its factorization.

639310133545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367835.

The product of its (nonzero) digits is 437400, while the sum is 43.

The spelling of 639310133545 in words is "six hundred thirty-nine billion, three hundred ten million, one hundred thirty-three thousand, five hundred forty-five".