65402020456 has 8 divisors (see below), whose sum is σ = 122628788370. Its totient is φ = 32701010224.

The previous prime is 65402020433. The next prime is 65402020493.

65402020456 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 64734624900 + 667395556 = 254430^2 + 25834^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4087626271 + ... + 4087626286.

Almost surely, 2^65402020456 is an apocalyptic number.

It is an amenable number.

65402020456 is a deficient number, since it is larger than the sum of its proper divisors (57226767914).

65402020456 is a wasteful number, since it uses less digits than its factorization.

65402020456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8175252563 (or 8175252559 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

It can be divided in two parts, 654020 and 20456, that added together give a palindrome (674476).

The spelling of 65402020456 in words is "sixty-five billion, four hundred two million, twenty thousand, four hundred fifty-six".