2145111775436 has 12 divisors (see below), whose sum is σ = 4290223550928. Its totient is φ = 919333618032.

The previous prime is 2145111775361. The next prime is 2145111775439. The reversal of 2145111775436 is 6345771115412.

2145111775436 is an admirable number.

It is a super-2 number, since 2×2145111775436² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2145111775439) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 38305567391 + ... + 38305567446.

It is an arithmetic number, because the mean of its divisors is an integer number (357518629244).

Almost surely, 2^{2145111775436} is an apocalyptic number.

It is an amenable number.

2145111775436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2145111775436 is a wasteful number, since it uses less digits than its factorization.

2145111775436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76611134848 (or 76611134846 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The spelling of 2145111775436 in words is "two trillion, one hundred forty-five billion, one hundred eleven million, seven hundred seventy-five thousand, four hundred thirty-six".