2517291780667 has 4 divisors (see below), whose sum is σ = 2585326693696. Its totient is φ = 2449256867640.

The previous prime is 2517291780557. The next prime is 2517291780701. The reversal of 2517291780667 is 7660871927152.

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

It is a cyclic number.

It is not a de Polignac number, because 2517291780667 - 2³⁹ = 1967535966779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2517291750667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34017456459 + ... + 34017456532.

It is an arithmetic number, because the mean of its divisors is an integer number (646331673424).

Almost surely, 2^{2517291780667} is an apocalyptic number.

2517291780667 is a deficient number, since it is larger than the sum of its proper divisors (68034913029).

2517291780667 is an equidigital number, since it uses as much as digits as its factorization.

2517291780667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68034913028.

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 2517291780667 in words is "two trillion, five hundred seventeen billion, two hundred ninety-one million, seven hundred eighty thousand, six hundred sixty-seven".