31618426543 has 4 divisors (see below), whose sum is σ = 34492828968. Its totient is φ = 28744024120.

The previous prime is 31618426523. The next prime is 31618426549. The reversal of 31618426543 is 34562481613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34562481613 = 11 ⋅3142043783.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31618426543 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 31618426543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31618426549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437201196 + ... + 1437201217.

It is an arithmetic number, because the mean of its divisors is an integer number (8623207242).

Almost surely, 2^31618426543 is an apocalyptic number.

31618426543 is a deficient number, since it is larger than the sum of its proper divisors (2874402425).

31618426543 is a wasteful number, since it uses less digits than its factorization.

31618426543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874402424.

The product of its digits is 414720, while the sum is 43.

The spelling of 31618426543 in words is "thirty-one billion, six hundred eighteen million, four hundred twenty-six thousand, five hundred forty-three".