61055555537 has 2 divisors, whose sum is σ = 61055555538. Its totient is φ = 61055555536.

The previous prime is 61055555501. The next prime is 61055555593. The reversal of 61055555537 is 73555555016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35584672321 + 25470883216 = 188639^2 + 159596^2 .

It is a cyclic number.

It is not a de Polignac number, because 61055555537 - 2¹⁸ = 61055293393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61055555491 and 61055555500.

It is not a weakly prime, because it can be changed into another prime (61055255537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30527777768 + 30527777769.

It is an arithmetic number, because the mean of its divisors is an integer number (30527777769).

Almost surely, 2^61055555537 is an apocalyptic number.

It is an amenable number.

61055555537 is a deficient number, since it is larger than the sum of its proper divisors (1).

61055555537 is an equidigital number, since it uses as much as digits as its factorization.

61055555537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1968750, while the sum is 47.

The spelling of 61055555537 in words is "sixty-one billion, fifty-five million, five hundred fifty-five thousand, five hundred thirty-seven".