65580401128 has 16 divisors (see below), whose sum is σ = 134141729760. Its totient is φ = 29809273200.

The previous prime is 65580401113. The next prime is 65580401137. The reversal of 65580401128 is 82110408556.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372615828 + ... + 372616003.

It is an arithmetic number, because the mean of its divisors is an integer number (8383858110).

Almost surely, 2^65580401128 is an apocalyptic number.

It is an amenable number.

65580401128 is an abundant number, since it is smaller than the sum of its proper divisors (68561328632).

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

65580401128 is a wasteful number, since it uses less digits than its factorization.

65580401128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745231848 (or 745231844 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 65580401128 in words is "sixty-five billion, five hundred eighty million, four hundred one thousand, one hundred twenty-eight".