64821602111329 has 16 divisors (see below), whose sum is σ = 74237515354240. Its totient is φ = 55444728821760.

The previous prime is 64821602111311. The next prime is 64821602111339. The reversal of 64821602111329 is 92311120612846.

It is a cyclic number.

It is not a de Polignac number, because 64821602111329 - 2¹⁵ = 64821602078561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64821602111339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1594027 + ... + 11497135.

It is an arithmetic number, because the mean of its divisors is an integer number (4639844709640).

Almost surely, 2^{64821602111329} is an apocalyptic number.

It is an amenable number.

64821602111329 is a deficient number, since it is larger than the sum of its proper divisors (9415913242911).

64821602111329 is a wasteful number, since it uses less digits than its factorization.

64821602111329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9905080.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 64821602111329 in words is "sixty-four trillion, eight hundred twenty-one billion, six hundred two million, one hundred eleven thousand, three hundred twenty-nine".