61255755755149 has 2 divisors, whose sum is σ = 61255755755150. Its totient is φ = 61255755755148.

The previous prime is 61255755755137. The next prime is 61255755755237. The reversal of 61255755755149 is 94155755755216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55421994714025 + 5833761041124 = 7444595^2 + 2415318^2 .

It is a cyclic number.

It is not a de Polignac number, because 61255755755149 - 2³⁹ = 60705999941261 is a prime.

It is a super-2 number, since 2×61255755755149² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61255755755119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30627877877574 + 30627877877575.

It is an arithmetic number, because the mean of its divisors is an integer number (30627877877575).

Almost surely, 2^{61255755755149} is an apocalyptic number.

It is an amenable number.

61255755755149 is a deficient number, since it is larger than the sum of its proper divisors (1).

61255755755149 is an equidigital number, since it uses as much as digits as its factorization.

61255755755149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330750000, while the sum is 67.

Adding to 61255755755149 its sum of digits (67), we get a palindrome (61255755755216).

The spelling of 61255755755149 in words is "sixty-one trillion, two hundred fifty-five billion, seven hundred fifty-five million, seven hundred fifty-five thousand, one hundred forty-nine".