65641126019 has 16 divisors (see below), whose sum is σ = 81578075328. Its totient is φ = 51522988032.

The previous prime is 65641126003. The next prime is 65641126021. The reversal of 65641126019 is 91062114656.

It is a cyclic number.

It is not a de Polignac number, because 65641126019 - 2⁴ = 65641126003 is a prime.

It is a super-2 number, since 2×65641126019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65641126079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7449734 + ... + 7458539.

It is an arithmetic number, because the mean of its divisors is an integer number (5098629708).

Almost surely, 2^65641126019 is an apocalyptic number.

65641126019 is a deficient number, since it is larger than the sum of its proper divisors (15936949309).

65641126019 is a wasteful number, since it uses less digits than its factorization.

65641126019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14908334.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 65641126019 in words is "sixty-five billion, six hundred forty-one million, one hundred twenty-six thousand, nineteen".