65510421797 has 2 divisors, whose sum is σ = 65510421798. Its totient is φ = 65510421796.

The previous prime is 65510421751. The next prime is 65510421877. The reversal of 65510421797 is 79712401556.

65510421797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49803063556 + 15707358241 = 223166^2 + 125329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65510421797 is a prime.

It is a super-4 number, since 4×65510421797⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65510421707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32755210898 + 32755210899.

It is an arithmetic number, because the mean of its divisors is an integer number (32755210899).

Almost surely, 2^65510421797 is an apocalyptic number.

It is an amenable number.

65510421797 is a deficient number, since it is larger than the sum of its proper divisors (1).

65510421797 is an equidigital number, since it uses as much as digits as its factorization.

65510421797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 65510421797 in words is "sixty-five billion, five hundred ten million, four hundred twenty-one thousand, seven hundred ninety-seven".