40812337838 has 4 divisors (see below), whose sum is σ = 61218506760. Its totient is φ = 20406168918.

The previous prime is 40812337831. The next prime is 40812337849. The reversal of 40812337838 is 83873321804.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40812337792 and 40812337801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40812337831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10203084458 + ... + 10203084461.

It is an arithmetic number, because the mean of its divisors is an integer number (15304626690).

Almost surely, 2^40812337838 is an apocalyptic number.

40812337838 is a deficient number, since it is larger than the sum of its proper divisors (20406168922).

40812337838 is a wasteful number, since it uses less digits than its factorization.

40812337838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20406168921.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 40812337838 in words is "forty billion, eight hundred twelve million, three hundred thirty-seven thousand, eight hundred thirty-eight".