16897557840 has 40 divisors (see below), whose sum is σ = 52382430048. Its totient is φ = 4506015360.

The previous prime is 16897557811. The next prime is 16897557863. The reversal of 16897557840 is 4875579861.

16897557840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×16897557840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 35203006 + ... + 35203485.

Almost surely, 2^16897557840 is an apocalyptic number.

16897557840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16897557840 is an abundant number, since it is smaller than the sum of its proper divisors (35484872208).

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

16897557840 is a wasteful number, since it uses less digits than its factorization.

16897557840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70406507 (or 70406501 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 60.

The spelling of 16897557840 in words is "sixteen billion, eight hundred ninety-seven million, five hundred fifty-seven thousand, eight hundred forty".