31087948570061 has 2 divisors, whose sum is σ = 31087948570062. Its totient is φ = 31087948570060.

The previous prime is 31087948570051. The next prime is 31087948570073. The reversal of 31087948570061 is 16007584978013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30352728067561 + 735220502500 = 5509331^2 + 857450^2 .

It is a cyclic number.

It is not a de Polignac number, because 31087948570061 - 2¹⁴ = 31087948553677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31087948570051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15543974285030 + 15543974285031.

It is an arithmetic number, because the mean of its divisors is an integer number (15543974285031).

Almost surely, 2^{31087948570061} is an apocalyptic number.

It is an amenable number.

31087948570061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31087948570061 is an equidigital number, since it uses as much as digits as its factorization.

31087948570061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 31087948570061 in words is "thirty-one trillion, eighty-seven billion, nine hundred forty-eight million, five hundred seventy thousand, sixty-one".