61328399646201 has 4 divisors (see below), whose sum is σ = 81771199528272. Its totient is φ = 40885599764132.

The previous prime is 61328399646193. The next prime is 61328399646203. The reversal of 61328399646201 is 10264699382316.

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 61328399646201 - 2³ = 61328399646193 is a prime.

It is a super-2 number, since 2×61328399646201² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61328399646203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10221399941031 + ... + 10221399941036.

It is an arithmetic number, because the mean of its divisors is an integer number (20442799882068).

Almost surely, 2^{61328399646201} is an apocalyptic number.

It is an amenable number.

61328399646201 is a deficient number, since it is larger than the sum of its proper divisors (20442799882071).

61328399646201 is a wasteful number, since it uses less digits than its factorization.

61328399646201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442799882070.

The product of its (nonzero) digits is 20155392, while the sum is 60.

The spelling of 61328399646201 in words is "sixty-one trillion, three hundred twenty-eight billion, three hundred ninety-nine million, six hundred forty-six thousand, two hundred one".