61051100989 has 2 divisors, whose sum is σ = 61051100990. Its totient is φ = 61051100988.

The previous prime is 61051100953. The next prime is 61051101011. The reversal of 61051100989 is 98900115016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56196495364 + 4854605625 = 237058^2 + 69675^2 .

It is a cyclic number.

It is not a de Polignac number, because 61051100989 - 2⁹ = 61051100477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61051100909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30525550494 + 30525550495.

It is an arithmetic number, because the mean of its divisors is an integer number (30525550495).

Almost surely, 2^61051100989 is an apocalyptic number.

It is an amenable number.

61051100989 is a deficient number, since it is larger than the sum of its proper divisors (1).

61051100989 is an equidigital number, since it uses as much as digits as its factorization.

61051100989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 61051100989 in words is "sixty-one billion, fifty-one million, one hundred thousand, nine hundred eighty-nine".