610721650065 has 32 divisors (see below), whose sum is σ = 1035017139456. Its totient is φ = 306444892160.

The previous prime is 610721650043. The next prime is 610721650093. The reversal of 610721650065 is 560056127016.

It is not a de Polignac number, because 610721650065 - 2⁶ = 610721650001 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 249589 + ... + 1133021.

It is an arithmetic number, because the mean of its divisors is an integer number (32344285608).

Almost surely, 2^610721650065 is an apocalyptic number.

It is an amenable number.

610721650065 is a deficient number, since it is larger than the sum of its proper divisors (424295489391).

610721650065 is a wasteful number, since it uses less digits than its factorization.

610721650065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886169.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 610721650065 in words is "six hundred ten billion, seven hundred twenty-one million, six hundred fifty thousand, sixty-five".