31380456549 has 16 divisors (see below), whose sum is σ = 46158122304. Its totient is φ = 18840048000.

The previous prime is 31380456533. The next prime is 31380456557. The reversal of 31380456549 is 94565408313.

It is not a de Polignac number, because 31380456549 - 2⁴ = 31380456533 is a prime.

It is a super-4 number, since 4×31380456549⁴ (a number of 43 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31380456498 and 31380456507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31380456509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9810927 + ... + 9814124.

It is an arithmetic number, because the mean of its divisors is an integer number (2884882644).

Almost surely, 2^31380456549 is an apocalyptic number.

31380456549 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

31380456549 is a deficient number, since it is larger than the sum of its proper divisors (14777665755).

31380456549 is a wasteful number, since it uses less digits than its factorization.

31380456549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19625108.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 31380456549 in words is "thirty-one billion, three hundred eighty million, four hundred fifty-six thousand, five hundred forty-nine".