65401552044 has 36 divisors (see below), whose sum is σ = 168439851216. Its totient is φ = 21389186208.

The previous prime is 65401552033. The next prime is 65401552121. The reversal of 65401552044 is 44025510456.

65401552044 is a `hidden beast` number, since 6 + 540 + 1 + 55 + 20 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17136864 + ... + 17140679.

It is an arithmetic number, because the mean of its divisors is an integer number (4678884756).

Almost surely, 2^65401552044 is an apocalyptic number.

It is an amenable number.

65401552044 is an abundant number, since it is smaller than the sum of its proper divisors (103038299172).

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

65401552044 is a wasteful number, since it uses less digits than its factorization.

65401552044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34277606 (or 34277601 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 65401552044 in words is "sixty-five billion, four hundred one million, five hundred fifty-two thousand, forty-four".