1665562054842 has 48 divisors (see below), whose sum is σ = 4125862620672. Its totient is φ = 475688674080.

The previous prime is 1665562054817. The next prime is 1665562054879. The reversal of 1665562054842 is 2484502655661.

1665562054842 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 5 + 620 + 5 + 4 + 8 + 4 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2262634 + ... + 2906997.

It is an arithmetic number, because the mean of its divisors is an integer number (85955471264).

Almost surely, 2^{1665562054842} is an apocalyptic number.

1665562054842 is an abundant number, since it is smaller than the sum of its proper divisors (2460300565830).

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

1665562054842 is a wasteful number, since it uses less digits than its factorization.

1665562054842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172203 (or 5172200 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 54.

The spelling of 1665562054842 in words is "one trillion, six hundred sixty-five billion, five hundred sixty-two million, fifty-four thousand, eight hundred forty-two".