31785440026 has 16 divisors (see below), whose sum is σ = 48698205696. Its totient is φ = 15552782896.

The previous prime is 31785440021. The next prime is 31785440041. The reversal of 31785440026 is 62004458713.

It is not an unprimeable number, because it can be changed into a prime (31785440021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209660 + ... + 1235656.

It is an arithmetic number, because the mean of its divisors is an integer number (3043637856).

Almost surely, 2^31785440026 is an apocalyptic number.

31785440026 is a deficient number, since it is larger than the sum of its proper divisors (16912765670).

31785440026 is a wasteful number, since it uses less digits than its factorization.

31785440026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39053.

The product of its (nonzero) digits is 161280, while the sum is 40.

Adding to 31785440026 its reverse (62004458713), we get a palindrome (93789898739).

The spelling of 31785440026 in words is "thirty-one billion, seven hundred eighty-five million, four hundred forty thousand, twenty-six".