65472457481 has 4 divisors (see below), whose sum is σ = 66108112512. Its totient is φ = 64836802452.

The previous prime is 65472457441. The next prime is 65472457489. The reversal of 65472457481 is 18475427456.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 65472457481 - 2¹⁰ = 65472456457 is a prime.

It is a super-2 number, since 2×65472457481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65472457489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317827361 + ... + 317827566.

It is an arithmetic number, because the mean of its divisors is an integer number (16527028128).

Almost surely, 2^65472457481 is an apocalyptic number.

It is an amenable number.

65472457481 is a deficient number, since it is larger than the sum of its proper divisors (635655031).

65472457481 is a wasteful number, since it uses less digits than its factorization.

65472457481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635655030.

The product of its digits is 7526400, while the sum is 53.

The spelling of 65472457481 in words is "sixty-five billion, four hundred seventy-two million, four hundred fifty-seven thousand, four hundred eighty-one".