2188020806415 has 32 divisors (see below), whose sum is σ = 3890172404160. Its totient is φ = 1166837139072.

The previous prime is 2188020806359. The next prime is 2188020806423. The reversal of 2188020806415 is 5146080208812.

2188020806415 is a `hidden beast` number, since 21 + 8 + 8 + 0 + 208 + 0 + 6 + 415 = 666.

It is a Cunningham number, because it is equal to 1479196²-1.

It is not a de Polignac number, because 2188020806415 - 2⁸ = 2188020806159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 739597 + ... + 2218793.

It is an arithmetic number, because the mean of its divisors is an integer number (121567887630).

Almost surely, 2^{2188020806415} is an apocalyptic number.

2188020806415 is a deficient number, since it is larger than the sum of its proper divisors (1702151597745).

2188020806415 is a wasteful number, since it uses less digits than its factorization.

2188020806415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490168 (or 1490162 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 2188020806415 in words is "two trillion, one hundred eighty-eight billion, twenty million, eight hundred six thousand, four hundred fifteen".