65641405016 has 16 divisors (see below), whose sum is σ = 134266510440. Its totient is φ = 29837002240.

The previous prime is 65641404977. The next prime is 65641405031. The reversal of 65641405016 is 61050414656.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372962441 + ... + 372962616.

Almost surely, 2^65641405016 is an apocalyptic number.

It is an amenable number.

65641405016 is an abundant number, since it is smaller than the sum of its proper divisors (68625105424).

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

65641405016 is a wasteful number, since it uses less digits than its factorization.

65641405016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745925074 (or 745925070 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 65641405016 in words is "sixty-five billion, six hundred forty-one million, four hundred five thousand, sixteen".