40938681851 has 2 divisors, whose sum is σ = 40938681852. Its totient is φ = 40938681850.

The previous prime is 40938681841. The next prime is 40938681929. The reversal of 40938681851 is 15818683904.

40938681851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40938681851 - 2⁶ = 40938681787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40938681793 and 40938681802.

It is not a weakly prime, because it can be changed into another prime (40938681841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20469340925 + 20469340926.

It is an arithmetic number, because the mean of its divisors is an integer number (20469340926).

Almost surely, 2^40938681851 is an apocalyptic number.

40938681851 is a deficient number, since it is larger than the sum of its proper divisors (1).

40938681851 is an equidigital number, since it uses as much as digits as its factorization.

40938681851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 40938681851 in words is "forty billion, nine hundred thirty-eight million, six hundred eighty-one thousand, eight hundred fifty-one".