31536411463481 has 2 divisors, whose sum is σ = 31536411463482. Its totient is φ = 31536411463480.

The previous prime is 31536411463457. The next prime is 31536411463489. The reversal of 31536411463481 is 18436411463513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19646914410256 + 11889497053225 = 4432484^2 + 3448115^2 .

It is a cyclic number.

It is not a de Polignac number, because 31536411463481 - 2²² = 31536407269177 is a prime.

It is a super-2 number, since 2×31536411463481² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31536411463489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15768205731740 + 15768205731741.

It is an arithmetic number, because the mean of its divisors is an integer number (15768205731741).

Almost surely, 2^{31536411463481} is an apocalyptic number.

It is an amenable number.

31536411463481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31536411463481 is an equidigital number, since it uses as much as digits as its factorization.

31536411463481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 50.

The spelling of 31536411463481 in words is "thirty-one trillion, five hundred thirty-six billion, four hundred eleven million, four hundred sixty-three thousand, four hundred eighty-one".