40010205123 has 16 divisors (see below), whose sum is σ = 67742146560. Its totient is φ = 22862974248.

The previous prime is 40010205097. The next prime is 40010205161. The reversal of 40010205123 is 32150201004.

It is not a de Polignac number, because 40010205123 - 2¹⁰ = 40010204099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40010205096 and 40010205105.

It is not an unprimeable number, because it can be changed into a prime (40010205023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105846915 + ... + 105847292.

It is an arithmetic number, because the mean of its divisors is an integer number (4233884160).

Almost surely, 2^40010205123 is an apocalyptic number.

40010205123 is a deficient number, since it is larger than the sum of its proper divisors (27731941437).

40010205123 is a wasteful number, since it uses less digits than its factorization.

40010205123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211694223 (or 211694217 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 40010205123 its reverse (32150201004), we get a palindrome (72160406127).

The spelling of 40010205123 in words is "forty billion, ten million, two hundred five thousand, one hundred twenty-three".