40938681853 has 4 divisors (see below), whose sum is σ = 41499485788. Its totient is φ = 40377877920.

The previous prime is 40938681851. The next prime is 40938681929. The reversal of 40938681853 is 35818683904.

40938681853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25926796324 + 15011885529 = 161018^2 + 122523^2 .

It is a cyclic number.

It is not a de Polignac number, because 40938681853 - 2¹ = 40938681851 is a prime.

It is a super-2 number, since 2×40938681853² (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 = 40938681794 and 40938681803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40938681851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280401858 + ... + 280402003.

It is an arithmetic number, because the mean of its divisors is an integer number (10374871447).

Almost surely, 2^40938681853 is an apocalyptic number.

It is an amenable number.

40938681853 is a deficient number, since it is larger than the sum of its proper divisors (560803935).

40938681853 is an equidigital number, since it uses as much as digits as its factorization.

40938681853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560803934.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 40938681853 in words is "forty billion, nine hundred thirty-eight million, six hundred eighty-one thousand, eight hundred fifty-three".