31729046331749 has 16 divisors (see below), whose sum is σ = 34346743126080. Its totient is φ = 29136972170880.

The previous prime is 31729046331737. The next prime is 31729046331769. The reversal of 31729046331749 is 94713364092713.

It is a cyclic number.

It is not a de Polignac number, because 31729046331749 - 2⁴ = 31729046331733 is a prime.

It is a super-2 number, since 2×31729046331749² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31729046331769) 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, 4754747 + ... + 9277160.

It is an arithmetic number, because the mean of its divisors is an integer number (2146671445380).

Almost surely, 2^{31729046331749} is an apocalyptic number.

It is an amenable number.

31729046331749 is a deficient number, since it is larger than the sum of its proper divisors (2617696794331).

31729046331749 is a wasteful number, since it uses less digits than its factorization.

31729046331749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14032820.

The product of its (nonzero) digits is 20575296, while the sum is 59.

The spelling of 31729046331749 in words is "thirty-one trillion, seven hundred twenty-nine billion, forty-six million, three hundred thirty-one thousand, seven hundred forty-nine".