61324156549 has 2 divisors, whose sum is σ = 61324156550. Its totient is φ = 61324156548.

The previous prime is 61324156483. The next prime is 61324156589. The reversal of 61324156549 is 94565142316.

61324156549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60408791524 + 915365025 = 245782^2 + 30255^2 .

It is a cyclic number.

It is not a de Polignac number, because 61324156549 - 2¹⁵ = 61324123781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61324156499 and 61324156508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61324156589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30662078274 + 30662078275.

It is an arithmetic number, because the mean of its divisors is an integer number (30662078275).

Almost surely, 2^61324156549 is an apocalyptic number.

It is an amenable number.

61324156549 is a deficient number, since it is larger than the sum of its proper divisors (1).

61324156549 is an equidigital number, since it uses as much as digits as its factorization.

61324156549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 46.

The spelling of 61324156549 in words is "sixty-one billion, three hundred twenty-four million, one hundred fifty-six thousand, five hundred forty-nine".