65402553109 has 2 divisors, whose sum is σ = 65402553110. Its totient is φ = 65402553108.

The previous prime is 65402553089. The next prime is 65402553113. The reversal of 65402553109 is 90135520456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49560554884 + 15841998225 = 222622^2 + 125865^2 .

It is a cyclic number.

It is not a de Polignac number, because 65402553109 - 2⁹ = 65402552597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65402553199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32701276554 + 32701276555.

It is an arithmetic number, because the mean of its divisors is an integer number (32701276555).

Almost surely, 2^65402553109 is an apocalyptic number.

It is an amenable number.

65402553109 is a deficient number, since it is larger than the sum of its proper divisors (1).

65402553109 is an equidigital number, since it uses as much as digits as its factorization.

65402553109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 40.

It can be divided in two parts, 6540255 and 3109, that added together give a square (6543364 = 2558²).

The spelling of 65402553109 in words is "sixty-five billion, four hundred two million, five hundred fifty-three thousand, one hundred nine".