65618834406 has 16 divisors (see below), whose sum is σ = 133462036800. Its totient is φ = 21502216808.

The previous prime is 65618834399. The next prime is 65618834419. The reversal of 65618834406 is 60443881656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92681616 + ... + 92682323.

It is an arithmetic number, because the mean of its divisors is an integer number (8341377300).

Almost surely, 2^65618834406 is an apocalyptic number.

65618834406 is an abundant number, since it is smaller than the sum of its proper divisors (67843202394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65618834406 is a wasteful number, since it uses less digits than its factorization.

65618834406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185364003.

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 65618834406 in words is "sixty-five billion, six hundred eighteen million, eight hundred thirty-four thousand, four hundred six".