31641525761 has 2 divisors, whose sum is σ = 31641525762. Its totient is φ = 31641525760.

The previous prime is 31641525739. The next prime is 31641525787. The reversal of 31641525761 is 16752514613.

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., 31641294400 + 231361 = 177880^2 + 481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31641525761 is a prime.

It is not a weakly prime, because it can be changed into another prime (31641525701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15820762880 + 15820762881.

It is an arithmetic number, because the mean of its divisors is an integer number (15820762881).

Almost surely, 2^31641525761 is an apocalyptic number.

It is an amenable number.

31641525761 is a deficient number, since it is larger than the sum of its proper divisors (1).

31641525761 is an equidigital number, since it uses as much as digits as its factorization.

31641525761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The spelling of 31641525761 in words is "thirty-one billion, six hundred forty-one million, five hundred twenty-five thousand, seven hundred sixty-one".