31143060639 has 6 divisors (see below), whose sum is σ = 44984420936. Its totient is φ = 20762040420.

The previous prime is 31143060593. The next prime is 31143060649. The reversal of 31143060639 is 93606034113.

31143060639 is a `hidden beast` number, since 3 + 1 + 1 + 43 + 0 + 606 + 3 + 9 = 666.

It is not a de Polignac number, because 31143060639 - 2¹² = 31143056543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143060649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1730170027 + ... + 1730170044.

Almost surely, 2^31143060639 is an apocalyptic number.

31143060639 is a deficient number, since it is larger than the sum of its proper divisors (13841360297).

31143060639 is a wasteful number, since it uses less digits than its factorization.

31143060639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460340077 (or 3460340074 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The spelling of 31143060639 in words is "thirty-one billion, one hundred forty-three million, sixty thousand, six hundred thirty-nine".