31464561797 has 2 divisors, whose sum is σ = 31464561798. Its totient is φ = 31464561796.

The previous prime is 31464561787. The next prime is 31464561827. The reversal of 31464561797 is 79716546413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30415708801 + 1048852996 = 174401^2 + 32386^2 .

It is a cyclic number.

It is not a de Polignac number, because 31464561797 - 2¹⁰ = 31464560773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31464561787) 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 as a sum of consecutive naturals, namely, 15732280898 + 15732280899.

It is an arithmetic number, because the mean of its divisors is an integer number (15732280899).

Almost surely, 2^31464561797 is an apocalyptic number.

It is an amenable number.

31464561797 is a deficient number, since it is larger than the sum of its proper divisors (1).

31464561797 is an equidigital number, since it uses as much as digits as its factorization.

31464561797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 53.

The spelling of 31464561797 in words is "thirty-one billion, four hundred sixty-four million, five hundred sixty-one thousand, seven hundred ninety-seven".