2187566640504 has 96 divisors (see below), whose sum is σ = 6771649173120. Its totient is φ = 624962772288.

The previous prime is 2187566640503. The next prime is 2187566640509. The reversal of 2187566640504 is 4050466657812.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187566640503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5577619 + ... + 5956925.

It is an arithmetic number, because the mean of its divisors is an integer number (70538012220).

Almost surely, 2^{2187566640504} is an apocalyptic number.

2187566640504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2187566640504 is an abundant number, since it is smaller than the sum of its proper divisors (4584082532616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2187566640504 is a wasteful number, since it uses less digits than its factorization.

2187566640504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390769 (or 390762 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 2187566640504 in words is "two trillion, one hundred eighty-seven billion, five hundred sixty-six million, six hundred forty thousand, five hundred four".