2188377899946 has 48 divisors (see below), whose sum is σ = 5419010233728. Its totient is φ = 625231245600.

The previous prime is 2188377899941. The next prime is 2188377899947. The reversal of 2188377899946 is 6499987738812.

2188377899946 is a `hidden beast` number, since 2 + 1 + 88 + 377 + 89 + 9 + 94 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (2188377899941) 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, 4036731 + ... + 4546641.

It is an arithmetic number, because the mean of its divisors is an integer number (112896046536).

Almost surely, 2^{2188377899946} is an apocalyptic number.

2188377899946 is an abundant number, since it is smaller than the sum of its proper divisors (3230632333782).

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

2188377899946 is a wasteful number, since it uses less digits than its factorization.

2188377899946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543987 (or 543984 counting only the distinct ones).

The product of its digits is 2633637888, while the sum is 81.

The spelling of 2188377899946 in words is "two trillion, one hundred eighty-eight billion, three hundred seventy-seven million, eight hundred ninety-nine thousand, nine hundred forty-six".