61331486899 has 2 divisors, whose sum is σ = 61331486900. Its totient is φ = 61331486898.

The previous prime is 61331486813. The next prime is 61331486921. The reversal of 61331486899 is 99868413316.

61331486899 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 is a cyclic number.

It is not a de Polignac number, because 61331486899 - 2¹⁵ = 61331454131 is a prime.

It is not a weakly prime, because it can be changed into another prime (61338486899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30665743449 + 30665743450.

It is an arithmetic number, because the mean of its divisors is an integer number (30665743450).

Almost surely, 2^61331486899 is an apocalyptic number.

61331486899 is a deficient number, since it is larger than the sum of its proper divisors (1).

61331486899 is an equidigital number, since it uses as much as digits as its factorization.

61331486899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 58.

The spelling of 61331486899 in words is "sixty-one billion, three hundred thirty-one million, four hundred eighty-six thousand, eight hundred ninety-nine".