40819256138 has 32 divisors (see below), whose sum is σ = 70444131840. Its totient is φ = 17611015680.

The previous prime is 40819256131. The next prime is 40819256197. The reversal of 40819256138 is 83165291804.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40819256092 and 40819256101.

It is not an unprimeable number, because it can be changed into a prime (40819256131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 999131 + ... + 1039182.

It is an arithmetic number, because the mean of its divisors is an integer number (2201379120).

Almost surely, 2^40819256138 is an apocalyptic number.

40819256138 is a deficient number, since it is larger than the sum of its proper divisors (29624875702).

40819256138 is a wasteful number, since it uses less digits than its factorization.

40819256138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038382.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 40819256138 in words is "forty billion, eight hundred nineteen million, two hundred fifty-six thousand, one hundred thirty-eight".