31078016449 has 2 divisors, whose sum is σ = 31078016450. Its totient is φ = 31078016448.

The previous prime is 31078016447. The next prime is 31078016479. The reversal of 31078016449 is 94461087013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30148071424 + 929945025 = 173632^2 + 30495^2 .

It is a cyclic number.

It is not a de Polignac number, because 31078016449 - 2¹ = 31078016447 is a prime.

Together with 31078016447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31078016443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15539008224 + 15539008225.

It is an arithmetic number, because the mean of its divisors is an integer number (15539008225).

Almost surely, 2^31078016449 is an apocalyptic number.

It is an amenable number.

31078016449 is a deficient number, since it is larger than the sum of its proper divisors (1).

31078016449 is an equidigital number, since it uses as much as digits as its factorization.

31078016449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 31078016449 in words is "thirty-one billion, seventy-eight million, sixteen thousand, four hundred forty-nine".