31380166847479 has 2 divisors, whose sum is σ = 31380166847480. Its totient is φ = 31380166847478.

The previous prime is 31380166847473. The next prime is 31380166847501. The reversal of 31380166847479 is 97474866108313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31380166847479 - 2¹⁷ = 31380166716407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31380166847473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15690083423739 + 15690083423740.

It is an arithmetic number, because the mean of its divisors is an integer number (15690083423740).

Almost surely, 2^{31380166847479} is an apocalyptic number.

31380166847479 is a deficient number, since it is larger than the sum of its proper divisors (1).

31380166847479 is an equidigital number, since it uses as much as digits as its factorization.

31380166847479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 146313216, while the sum is 67.

The spelling of 31380166847479 in words is "thirty-one trillion, three hundred eighty billion, one hundred sixty-six million, eight hundred forty-seven thousand, four hundred seventy-nine".