40165213123 has 12 divisors (see below), whose sum is σ = 46789490592. Its totient is φ = 34378184400.

The previous prime is 40165213087. The next prime is 40165213129. The reversal of 40165213123 is 32131256104.

It is a de Polignac number, because none of the positive numbers 2^k-40165213123 is a prime.

It is a super-2 number, since 2×40165213123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40165213091 and 40165213100.

It is not an unprimeable number, because it can be changed into a prime (40165213129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550315 + ... + 619012.

It is an arithmetic number, because the mean of its divisors is an integer number (3899124216).

Almost surely, 2^40165213123 is an apocalyptic number.

40165213123 is a deficient number, since it is larger than the sum of its proper divisors (6624277469).

40165213123 is a wasteful number, since it uses less digits than its factorization.

40165213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170042 (or 1170035 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 40165213123 its reverse (32131256104), we get a palindrome (72296469227).

The spelling of 40165213123 in words is "forty billion, one hundred sixty-five million, two hundred thirteen thousand, one hundred twenty-three".