65618225601 has 4 divisors (see below), whose sum is σ = 87490967472. Its totient is φ = 43745483732.

The previous prime is 65618225587. The next prime is 65618225611. The reversal of 65618225601 is 10652281656.

65618225601 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 65618225601 - 2¹⁵ = 65618192833 is a prime.

It is a super-2 number, since 2×65618225601² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65618225611) 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, 10936370931 + ... + 10936370936.

It is an arithmetic number, because the mean of its divisors is an integer number (21872741868).

Almost surely, 2^65618225601 is an apocalyptic number.

It is an amenable number.

65618225601 is a deficient number, since it is larger than the sum of its proper divisors (21872741871).

65618225601 is a wasteful number, since it uses less digits than its factorization.

65618225601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21872741870.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 65618225601 in words is "sixty-five billion, six hundred eighteen million, two hundred twenty-five thousand, six hundred one".