65138640610 has 32 divisors (see below), whose sum is σ = 118332513792. Its totient is φ = 25815530880.

The previous prime is 65138640599. The next prime is 65138640613. The reversal of 65138640610 is 1604683156.

It is not an unprimeable number, because it can be changed into a prime (65138640613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671055 + ... + 761965.

It is an arithmetic number, because the mean of its divisors is an integer number (3697891056).

Almost surely, 2^65138640610 is an apocalyptic number.

65138640610 is a deficient number, since it is larger than the sum of its proper divisors (53193873182).

65138640610 is a wasteful number, since it uses less digits than its factorization.

65138640610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91578.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 65138640610 in words is "sixty-five billion, one hundred thirty-eight million, six hundred forty thousand, six hundred ten".