61072737149 has 2 divisors, whose sum is σ = 61072737150. Its totient is φ = 61072737148.

The previous prime is 61072737139. The next prime is 61072737151. The reversal of 61072737149 is 94173727016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50977511524 + 10095225625 = 225782^2 + 100475^2 .

It is a cyclic number.

It is not a de Polignac number, because 61072737149 - 2²⁴ = 61055959933 is a prime.

It is a Sophie Germain prime.

Together with 61072737151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61072737119) 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, 30536368574 + 30536368575.

It is an arithmetic number, because the mean of its divisors is an integer number (30536368575).

Almost surely, 2^61072737149 is an apocalyptic number.

It is an amenable number.

61072737149 is a deficient number, since it is larger than the sum of its proper divisors (1).

61072737149 is an equidigital number, since it uses as much as digits as its factorization.

61072737149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 47.

The spelling of 61072737149 in words is "sixty-one billion, seventy-two million, seven hundred thirty-seven thousand, one hundred forty-nine".