61497026413 has 2 divisors, whose sum is σ = 61497026414. Its totient is φ = 61497026412.

The previous prime is 61497026401. The next prime is 61497026441. The reversal of 61497026413 is 31462079416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31110609924 + 30386416489 = 176382^2 + 174317^2 .

It is a cyclic number.

It is not a de Polignac number, because 61497026413 - 2²⁵ = 61463471981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61497026413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61497006413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30748513206 + 30748513207.

It is an arithmetic number, because the mean of its divisors is an integer number (30748513207).

Almost surely, 2^61497026413 is an apocalyptic number.

It is an amenable number.

61497026413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61497026413 is an equidigital number, since it uses as much as digits as its factorization.

61497026413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 61497026413 in words is "sixty-one billion, four hundred ninety-seven million, twenty-six thousand, four hundred thirteen".