31847884552449 has 27 divisors (see below), whose sum is σ = 53513311271043. Its totient is φ = 18198723452112.

The previous prime is 31847884552391. The next prime is 31847884552469. The reversal of 31847884552449 is 94425548874813.

The square root of 31847884552449 is 5643393.

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

31847884552449 is a `hidden beast` number, since 3 + 1 + 8 + 478 + 84 + 55 + 24 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31167041735025 + 680842817424 = 5582745^2 + 825132^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31847884552449 is a prime.

It is a super-2 number, since 2×31847884552449² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31847884552469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 118376887 + ... + 118645619.

Almost surely, 2^{31847884552449} is an apocalyptic number.

31847884552449 is the 5643393-rd square number.

31847884552449 is the 2821697-th centered octagonal number.

It is an amenable number.

31847884552449 is a deficient number, since it is larger than the sum of its proper divisors (21665426718594).

31847884552449 is an frugal number, since it uses more digits than its factorization.

31847884552449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537486 (or 268743 counting only the distinct ones).

The product of its digits is 1238630400, while the sum is 72.

The spelling of 31847884552449 in words is "thirty-one trillion, eight hundred forty-seven billion, eight hundred eighty-four million, five hundred fifty-two thousand, four hundred forty-nine".