61546038809 has 2 divisors, whose sum is σ = 61546038810. Its totient is φ = 61546038808.

The previous prime is 61546038803. The next prime is 61546038929. The reversal of 61546038809 is 90883064516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57676825600 + 3869213209 = 240160^2 + 62203^2 .

It is a cyclic number.

It is not a de Polignac number, because 61546038809 - 2¹² = 61546034713 is a prime.

It is not a weakly prime, because it can be changed into another prime (61546038803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30773019404 + 30773019405.

It is an arithmetic number, because the mean of its divisors is an integer number (30773019405).

Almost surely, 2^61546038809 is an apocalyptic number.

It is an amenable number.

61546038809 is a deficient number, since it is larger than the sum of its proper divisors (1).

61546038809 is an equidigital number, since it uses as much as digits as its factorization.

61546038809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 61546038809 in words is "sixty-one billion, five hundred forty-six million, thirty-eight thousand, eight hundred nine".