65553621632 has 32 divisors (see below), whose sum is σ = 130659674400. Its totient is φ = 32760605440.

The previous prime is 65553621631. The next prime is 65553621643. The reversal of 65553621632 is 23612635556.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (65553621631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135407 + ... + 386577.

It is an arithmetic number, because the mean of its divisors is an integer number (4083114825).

Almost surely, 2^65553621632 is an apocalyptic number.

It is an amenable number.

65553621632 is a deficient number, since it is larger than the sum of its proper divisors (65106052768).

65553621632 is a wasteful number, since it uses less digits than its factorization.

65553621632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253224 (or 253212 counting only the distinct ones).

The product of its digits is 972000, while the sum is 44.

The spelling of 65553621632 in words is "sixty-five billion, five hundred fifty-three million, six hundred twenty-one thousand, six hundred thirty-two".