31444742646 has 32 divisors (see below), whose sum is σ = 70056885600. Its totient is φ = 10454628960.

The previous prime is 31444742621. The next prime is 31444742657. The reversal of 31444742646 is 64624744413.

31444742646 is a `hidden beast` number, since 3 + 144 + 47 + 426 + 46 = 666.

It is a super-3 number, since 3×31444742646³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 727465 + ... + 769476.

It is an arithmetic number, because the mean of its divisors is an integer number (2189277675).

Almost surely, 2^31444742646 is an apocalyptic number.

31444742646 is an abundant number, since it is smaller than the sum of its proper divisors (38612142954).

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

31444742646 is a wasteful number, since it uses less digits than its factorization.

31444742646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497341 (or 1497335 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 45.

The spelling of 31444742646 in words is "thirty-one billion, four hundred forty-four million, seven hundred forty-two thousand, six hundred forty-six".