61397137297 has 2 divisors, whose sum is σ = 61397137298. Its totient is φ = 61397137296.

The previous prime is 61397137289. The next prime is 61397137313. The reversal of 61397137297 is 79273179316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60567178816 + 829958481 = 246104^2 + 28809^2 .

It is a cyclic number.

It is not a de Polignac number, because 61397137297 - 2³ = 61397137289 is a prime.

It is not a weakly prime, because it can be changed into another prime (61397137237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30698568648 + 30698568649.

It is an arithmetic number, because the mean of its divisors is an integer number (30698568649).

Almost surely, 2^61397137297 is an apocalyptic number.

It is an amenable number.

61397137297 is a deficient number, since it is larger than the sum of its proper divisors (1).

61397137297 is an equidigital number, since it uses as much as digits as its factorization.

61397137297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000564, while the sum is 55.

The spelling of 61397137297 in words is "sixty-one billion, three hundred ninety-seven million, one hundred thirty-seven thousand, two hundred ninety-seven".