31728046623 has 16 divisors (see below), whose sum is σ = 52066538496. Its totient is φ = 16735672800.

The previous prime is 31728046613. The next prime is 31728046627. The reversal of 31728046623 is 32664082713.

It is not a de Polignac number, because 31728046623 - 2²⁴ = 31711269407 is a prime.

It is a super-2 number, since 2×31728046623² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31728046627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58109703 + ... + 58110248.

It is an arithmetic number, because the mean of its divisors is an integer number (3254158656).

Almost surely, 2^31728046623 is an apocalyptic number.

31728046623 is a deficient number, since it is larger than the sum of its proper divisors (20338491873).

31728046623 is a wasteful number, since it uses less digits than its factorization.

31728046623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116219974.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 31728046623 in words is "thirty-one billion, seven hundred twenty-eight million, forty-six thousand, six hundred twenty-three".