2639687575009 has 4 divisors (see below), whose sum is σ = 2639747556100. Its totient is φ = 2639627593920.

The previous prime is 2639687575003. The next prime is 2639687575013. The reversal of 2639687575009 is 9005757869362.

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 1291541331600 + 1348146243409 = 1136460^2 + 1161097^2 .

It is a cyclic number.

It is not a de Polignac number, because 2639687575009 - 2³ = 2639687575001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2639687575001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29924484 + ... + 30012565.

It is an arithmetic number, because the mean of its divisors is an integer number (659936889025).

Almost surely, 2^{2639687575009} is an apocalyptic number.

It is an amenable number.

2639687575009 is a deficient number, since it is larger than the sum of its proper divisors (59981091).

2639687575009 is an equidigital number, since it uses as much as digits as its factorization.

2639687575009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59981090.

The product of its (nonzero) digits is 171460800, while the sum is 67.

The spelling of 2639687575009 in words is "two trillion, six hundred thirty-nine billion, six hundred eighty-seven million, five hundred seventy-five thousand, nine".