65820456461 has 4 divisors (see below), whose sum is σ = 67943697024. Its totient is φ = 63697215900.

The previous prime is 65820456439. The next prime is 65820456473. The reversal of 65820456461 is 16465402856.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65820456461 - 2⁶ = 65820456397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65820452461) 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 in 3 ways as a sum of consecutive naturals, for example, 1061620235 + ... + 1061620296.

It is an arithmetic number, because the mean of its divisors is an integer number (16985924256).

Almost surely, 2^65820456461 is an apocalyptic number.

It is an amenable number.

65820456461 is a deficient number, since it is larger than the sum of its proper divisors (2123240563).

65820456461 is a wasteful number, since it uses less digits than its factorization.

65820456461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123240562.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 65820456461 in words is "sixty-five billion, eight hundred twenty million, four hundred fifty-six thousand, four hundred sixty-one".