65840041628 has 12 divisors (see below), whose sum is σ = 115223642352. Its totient is φ = 32919000960.

The previous prime is 65840041621. The next prime is 65840041643. The reversal of 65840041628 is 82614004856.

It is a happy number.

It is a super-2 number, since 2×65840041628² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65840041621) 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, 99125 + ... + 376172.

It is an arithmetic number, because the mean of its divisors is an integer number (9601970196).

Almost surely, 2^65840041628 is an apocalyptic number.

It is an amenable number.

65840041628 is a deficient number, since it is larger than the sum of its proper divisors (49383600724).

65840041628 is a wasteful number, since it uses less digits than its factorization.

65840041628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509932 (or 509930 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 65840041628 in words is "sixty-five billion, eight hundred forty million, forty-one thousand, six hundred twenty-eight".