16259555840 has 80 divisors (see below), whose sum is σ = 42528974400. Its totient is φ = 5912555520.

The previous prime is 16259555827. The next prime is 16259555867. The reversal of 16259555840 is 4855595261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×16259555840² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260540 + ... + 316859.

It is an arithmetic number, because the mean of its divisors is an integer number (531612180).

Almost surely, 2^16259555840 is an apocalyptic number.

16259555840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16259555840 is an abundant number, since it is smaller than the sum of its proper divisors (26269418560).

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

16259555840 is an equidigital number, since it uses as much as digits as its factorization.

16259555840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577433 (or 577417 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 50.

The spelling of 16259555840 in words is "sixteen billion, two hundred fifty-nine million, five hundred fifty-five thousand, eight hundred forty".