61155306743 has 2 divisors, whose sum is σ = 61155306744. Its totient is φ = 61155306742.

The previous prime is 61155306679. The next prime is 61155306767. The reversal of 61155306743 is 34760355116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61155306743 - 2⁶ = 61155306679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61155306743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61155206743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30577653371 + 30577653372.

It is an arithmetic number, because the mean of its divisors is an integer number (30577653372).

Almost surely, 2^61155306743 is an apocalyptic number.

61155306743 is a deficient number, since it is larger than the sum of its proper divisors (1).

61155306743 is an equidigital number, since it uses as much as digits as its factorization.

61155306743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 61155306743 in words is "sixty-one billion, one hundred fifty-five million, three hundred six thousand, seven hundred forty-three".