32428220561 has 16 divisors (see below), whose sum is σ = 36538269696. Its totient is φ = 28512930000.

The previous prime is 32428220551. The next prime is 32428220593. The reversal of 32428220561 is 16502282423.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32428220561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32428220521) 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, 591296 + ... + 643806.

It is an arithmetic number, because the mean of its divisors is an integer number (2283641856).

Almost surely, 2^32428220561 is an apocalyptic number.

32428220561 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

32428220561 is a deficient number, since it is larger than the sum of its proper divisors (4110049135).

32428220561 is a wasteful number, since it uses less digits than its factorization.

32428220561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54364.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 32428220561 in words is "thirty-two billion, four hundred twenty-eight million, two hundred twenty thousand, five hundred sixty-one".