2187566640559 has 16 divisors (see below), whose sum is σ = 2219906392704. Its totient is φ = 2155501389600.

The previous prime is 2187566640521. The next prime is 2187566640583. The reversal of 2187566640559 is 9550466657812.

It is a cyclic number.

It is not a de Polignac number, because 2187566640559 - 2¹⁵ = 2187566607791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2187566640559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187566640509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15174432 + ... + 15317914.

It is an arithmetic number, because the mean of its divisors is an integer number (138744149544).

Almost surely, 2^{2187566640559} is an apocalyptic number.

2187566640559 is a deficient number, since it is larger than the sum of its proper divisors (32339752145).

2187566640559 is a wasteful number, since it uses less digits than its factorization.

2187566640559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144438.

The product of its (nonzero) digits is 108864000, while the sum is 64.

The spelling of 2187566640559 in words is "two trillion, one hundred eighty-seven billion, five hundred sixty-six million, six hundred forty thousand, five hundred fifty-nine".