65267625521 has 4 divisors (see below), whose sum is σ = 74591572032. Its totient is φ = 55943679012.

The previous prime is 65267625517. The next prime is 65267625529. The reversal of 65267625521 is 12552676256.

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 65267625521 - 2² = 65267625517 is a prime.

It is a super-2 number, since 2×65267625521² (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 (65267625529) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4661973245 + ... + 4661973258.

It is an arithmetic number, because the mean of its divisors is an integer number (18647893008).

Almost surely, 2^65267625521 is an apocalyptic number.

It is an amenable number.

65267625521 is a deficient number, since it is larger than the sum of its proper divisors (9323946511).

65267625521 is an equidigital number, since it uses as much as digits as its factorization.

65267625521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9323946510.

The product of its digits is 1512000, while the sum is 47.

The spelling of 65267625521 in words is "sixty-five billion, two hundred sixty-seven million, six hundred twenty-five thousand, five hundred twenty-one".