40185040842 has 64 divisors (see below), whose sum is σ = 90029698560. Its totient is φ = 13285746432.

The previous prime is 40185040823. The next prime is 40185040849. The reversal of 40185040842 is 24804058104.

It is a super-2 number, since 2×40185040842² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40185040797 and 40185040806.

It is not an unprimeable number, because it can be changed into a prime (40185040849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15260758 + ... + 15263390.

It is an arithmetic number, because the mean of its divisors is an integer number (1406714040).

Almost surely, 2^40185040842 is an apocalyptic number.

40185040842 is an abundant number, since it is smaller than the sum of its proper divisors (49844657718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40185040842 is a wasteful number, since it uses less digits than its factorization.

40185040842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844 (or 4838 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

Adding to 40185040842 its reverse (24804058104), we get a palindrome (64989098946).

The spelling of 40185040842 in words is "forty billion, one hundred eighty-five million, forty thousand, eight hundred forty-two".