40165213125 has 40 divisors (see below), whose sum is σ = 66969612864. Its totient is φ = 21405760000.

The previous prime is 40165213087. The next prime is 40165213129. The reversal of 40165213125 is 52131256104.

It is not a de Polignac number, because 40165213125 - 2¹⁸ = 40164950981 is a prime.

It is a super-2 number, since 2×40165213125² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40165213092 and 40165213101.

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 2826037 + ... + 2840213.

Almost surely, 2^40165213125 is an apocalyptic number.

It is an amenable number.

40165213125 is a deficient number, since it is larger than the sum of its proper divisors (26804399739).

40165213125 is a wasteful number, since it uses less digits than its factorization.

40165213125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15711 (or 15696 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 40165213125 its reverse (52131256104), we get a palindrome (92296469229).

The spelling of 40165213125 in words is "forty billion, one hundred sixty-five million, two hundred thirteen thousand, one hundred twenty-five".