61348439261 has 2 divisors, whose sum is σ = 61348439262. Its totient is φ = 61348439260.

The previous prime is 61348439239. The next prime is 61348439263. The reversal of 61348439261 is 16293484316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53589472036 + 7758967225 = 231494^2 + 88085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61348439261 is a prime.

It is a super-2 number, since 2×61348439261² (a number of 22 digits) contains 22 as substring.

Together with 61348439263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61348439263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30674219630 + 30674219631.

It is an arithmetic number, because the mean of its divisors is an integer number (30674219631).

Almost surely, 2^61348439261 is an apocalyptic number.

It is an amenable number.

61348439261 is a deficient number, since it is larger than the sum of its proper divisors (1).

61348439261 is an equidigital number, since it uses as much as digits as its factorization.

61348439261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 47.

The spelling of 61348439261 in words is "sixty-one billion, three hundred forty-eight million, four hundred thirty-nine thousand, two hundred sixty-one".