31061640706 has 4 divisors (see below), whose sum is σ = 46592461062. Its totient is φ = 15530820352.

The previous prime is 31061640703. The next prime is 31061640739. The reversal of 31061640706 is 60704616013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28327919481 + 2733721225 = 168309^2 + 52285^2 .

It is not an unprimeable number, because it can be changed into a prime (31061640703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7765410175 + ... + 7765410178.

Almost surely, 2^31061640706 is an apocalyptic number.

31061640706 is a deficient number, since it is larger than the sum of its proper divisors (15530820356).

31061640706 is a wasteful number, since it uses less digits than its factorization.

31061640706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15530820355.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 31061640706 in words is "thirty-one billion, sixty-one million, six hundred forty thousand, seven hundred six".