31856055644 has 24 divisors (see below), whose sum is σ = 63731189088. Its totient is φ = 13648507200.

The previous prime is 31856055611. The next prime is 31856055667. The reversal of 31856055644 is 44655065813.

It is a congruent number.

It is an unprimeable number.

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, 74207 + ... + 263094.

It is an arithmetic number, because the mean of its divisors is an integer number (2655466212).

Almost surely, 2^31856055644 is an apocalyptic number.

It is an amenable number.

31856055644 is an abundant number, since it is smaller than the sum of its proper divisors (31875133444).

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

31856055644 is a wasteful number, since it uses less digits than its factorization.

31856055644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340685 (or 340683 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 31856055644 in words is "thirty-one billion, eight hundred fifty-six million, fifty-five thousand, six hundred forty-four".