65006152521 has 4 divisors (see below), whose sum is σ = 86674870032. Its totient is φ = 43337435012.

The previous prime is 65006152451. The next prime is 65006152529. The reversal of 65006152521 is 12525160056.

65006152521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65006152521 - 2³⁵ = 30646414153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65006152529) 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, 10834358751 + ... + 10834358756.

It is an arithmetic number, because the mean of its divisors is an integer number (21668717508).

Almost surely, 2^65006152521 is an apocalyptic number.

It is an amenable number.

65006152521 is a deficient number, since it is larger than the sum of its proper divisors (21668717511).

65006152521 is a wasteful number, since it uses less digits than its factorization.

65006152521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21668717510.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 65006152521 in words is "sixty-five billion, six million, one hundred fifty-two thousand, five hundred twenty-one".