54072409561 has 2 divisors, whose sum is σ = 54072409562. Its totient is φ = 54072409560.

The previous prime is 54072409519. The next prime is 54072409591. The reversal of 54072409561 is 16590427045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54065550400 + 6859161 = 232520^2 + 2619^2 .

It is a cyclic number.

It is not a de Polignac number, because 54072409561 - 2¹¹ = 54072407513 is a prime.

It is not a weakly prime, because it can be changed into another prime (54072409591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27036204780 + 27036204781.

It is an arithmetic number, because the mean of its divisors is an integer number (27036204781).

Almost surely, 2^54072409561 is an apocalyptic number.

It is an amenable number.

54072409561 is a deficient number, since it is larger than the sum of its proper divisors (1).

54072409561 is an equidigital number, since it uses as much as digits as its factorization.

54072409561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 54072409561 in words is "fifty-four billion, seventy-two million, four hundred nine thousand, five hundred sixty-one".