2187566640495 has 96 divisors (see below), whose sum is σ = 4111137374400. Its totient is φ = 1103433762816.

The previous prime is 2187566640439. The next prime is 2187566640503. The reversal of 2187566640495 is 5940466657812.

It is not a de Polignac number, because 2187566640495 - 2⁹ = 2187566639983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6183847 + ... + 6528023.

It is an arithmetic number, because the mean of its divisors is an integer number (42824347650).

Almost surely, 2^{2187566640495} is an apocalyptic number.

2187566640495 is a deficient number, since it is larger than the sum of its proper divisors (1923570733905).

2187566640495 is a wasteful number, since it uses less digits than its factorization.

2187566640495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344326 (or 344297 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 2187566640495 in words is "two trillion, one hundred eighty-seven billion, five hundred sixty-six million, six hundred forty thousand, four hundred ninety-five".