30731679415729 has 4 divisors (see below), whose sum is σ = 31791392499060. Its totient is φ = 29671966332400.

The previous prime is 30731679415663. The next prime is 30731679415739. The reversal of 30731679415729 is 92751497613703.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26057175972129 + 4674503443600 = 5104623^2 + 2162060^2 .

It is a cyclic number.

It is not a de Polignac number, because 30731679415729 - 2¹⁵ = 30731679382961 is a prime.

It is a super-2 number, since 2×30731679415729² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30731679415739) 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, 529856541622 + ... + 529856541679.

It is an arithmetic number, because the mean of its divisors is an integer number (7947848124765).

Almost surely, 2^{30731679415729} is an apocalyptic number.

It is an amenable number.

30731679415729 is a deficient number, since it is larger than the sum of its proper divisors (1059713083331).

30731679415729 is a wasteful number, since it uses less digits than its factorization.

30731679415729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059713083330.

The product of its (nonzero) digits is 60011280, while the sum is 64.

The spelling of 30731679415729 in words is "thirty trillion, seven hundred thirty-one billion, six hundred seventy-nine million, four hundred fifteen thousand, seven hundred twenty-nine".