31403056368649 has 9 divisors (see below), whose sum is σ = 36530131611207. Its totient is φ = 26916871835784.

The previous prime is 31403056368643. The next prime is 31403056368653. The reversal of 31403056368649 is 94686365030413.

It is a happy number.

The square root of 31403056368649 is 5603843.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 463430093049 + 30939626275600 = 680757^2 + 5562340^2 .

It is not a de Polignac number, because 31403056368649 - 2¹³ = 31403056360457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31403056368593 and 31403056368602.

It is not an unprimeable number, because it can be changed into a prime (31403056368643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38826627 + ... + 39627175.

Almost surely, 2^{31403056368649} is an apocalyptic number.

31403056368649 is the 5603843-rd square number.

31403056368649 is the 2801922-nd centered octagonal number.

It is an amenable number.

31403056368649 is a deficient number, since it is larger than the sum of its proper divisors (5127075242558).

31403056368649 is an frugal number, since it uses more digits than its factorization.

31403056368649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601112 (or 800556 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 58.

The spelling of 31403056368649 in words is "thirty-one trillion, four hundred three billion, fifty-six million, three hundred sixty-eight thousand, six hundred forty-nine".