31477481677 has 2 divisors, whose sum is σ = 31477481678. Its totient is φ = 31477481676.

The previous prime is 31477481669. The next prime is 31477481719. The reversal of 31477481677 is 77618477413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31308117481 + 169364196 = 176941^2 + 13014^2 .

It is a cyclic number.

It is not a de Polignac number, because 31477481677 - 2³ = 31477481669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31477401677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15738740838 + 15738740839.

It is an arithmetic number, because the mean of its divisors is an integer number (15738740839).

Almost surely, 2^31477481677 is an apocalyptic number.

It is an amenable number.

31477481677 is a deficient number, since it is larger than the sum of its proper divisors (1).

31477481677 is an equidigital number, since it uses as much as digits as its factorization.

31477481677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5531904, while the sum is 55.

The spelling of 31477481677 in words is "thirty-one billion, four hundred seventy-seven million, four hundred eighty-one thousand, six hundred seventy-seven".