16526979840 has 144 divisors (see below), whose sum is σ = 60323574528. Its totient is φ = 3777589248.

The previous prime is 16526979839. The next prime is 16526979841. The reversal of 16526979840 is 4897962561.

It is an interprime number because it is at equal distance from previous prime (16526979839) and next prime (16526979841).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16526979841) 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, 280542 + ... + 334301.

It is an arithmetic number, because the mean of its divisors is an integer number (418913712).

Almost surely, 2^16526979840 is an apocalyptic number.

16526979840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16526979840 is an abundant number, since it is smaller than the sum of its proper divisors (43796594688).

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

16526979840 is an equidigital number, since it uses as much as digits as its factorization.

16526979840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614874 (or 614860 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 16526979840 in words is "sixteen billion, five hundred twenty-six million, nine hundred seventy-nine thousand, eight hundred forty".