65398999961 has 8 divisors (see below), whose sum is σ = 65638080000. Its totient is φ = 65160348160.

The previous prime is 65398999921. The next prime is 65399000033. The reversal of 65398999961 is 16999989356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65398999961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65398999921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200540 + ... + 413538.

It is an arithmetic number, because the mean of its divisors is an integer number (8204760000).

Almost surely, 2^65398999961 is an apocalyptic number.

It is an amenable number.

65398999961 is a deficient number, since it is larger than the sum of its proper divisors (239080039).

65398999961 is a wasteful number, since it uses less digits than its factorization.

65398999961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214119.

The product of its digits is 255091680, while the sum is 74.

The spelling of 65398999961 in words is "sixty-five billion, three hundred ninety-eight million, nine hundred ninety-nine thousand, nine hundred sixty-one".