61183268149 has 2 divisors, whose sum is σ = 61183268150. Its totient is φ = 61183268148.

The previous prime is 61183268137. The next prime is 61183268221. The reversal of 61183268149 is 94186238116.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51159654225 + 10023613924 = 226185^2 + 100118^2 .

It is a cyclic number.

It is not a de Polignac number, because 61183268149 - 2⁹ = 61183267637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61183268449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30591634074 + 30591634075.

It is an arithmetic number, because the mean of its divisors is an integer number (30591634075).

Almost surely, 2^61183268149 is an apocalyptic number.

It is an amenable number.

61183268149 is a deficient number, since it is larger than the sum of its proper divisors (1).

61183268149 is an equidigital number, since it uses as much as digits as its factorization.

61183268149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The spelling of 61183268149 in words is "sixty-one billion, one hundred eighty-three million, two hundred sixty-eight thousand, one hundred forty-nine".