31444340785 has 48 divisors (see below), whose sum is σ = 47293355088. Its totient is φ = 19867668480.

The previous prime is 31444340749. The next prime is 31444340801. The reversal of 31444340785 is 58704344413.

It can be written as a sum of positive squares in 8 ways, for example, as 13660416 + 31430680369 = 3696^2 + 177287^2 .

It is not a de Polignac number, because 31444340785 - 2¹³ = 31444332593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16117 + ... + 251293.

It is an arithmetic number, because the mean of its divisors is an integer number (985278231).

Almost surely, 2^31444340785 is an apocalyptic number.

It is an amenable number.

31444340785 is a deficient number, since it is larger than the sum of its proper divisors (15849014303).

31444340785 is a wasteful number, since it uses less digits than its factorization.

31444340785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235234 (or 235223 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 31444340785 in words is "thirty-one billion, four hundred forty-four million, three hundred forty thousand, seven hundred eighty-five".