31639045543 has 12 divisors (see below), whose sum is σ = 37799325192. Its totient is φ = 26386229520.

The previous prime is 31639045541. The next prime is 31639045573. The reversal of 31639045543 is 34554093613.

It is not a de Polignac number, because 31639045543 - 2¹ = 31639045541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31639045543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31639045541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8723793 + ... + 8727418.

It is an arithmetic number, because the mean of its divisors is an integer number (3149943766).

Almost surely, 2^31639045543 is an apocalyptic number.

31639045543 is a deficient number, since it is larger than the sum of its proper divisors (6160279649).

31639045543 is a wasteful number, since it uses less digits than its factorization.

31639045543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17451262 (or 17451255 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 43.

The spelling of 31639045543 in words is "thirty-one billion, six hundred thirty-nine million, forty-five thousand, five hundred forty-three".