16978979201 has 6 divisors (see below), whose sum is σ = 17749292610. Its totient is φ = 16240762208.

The previous prime is 16978979197. The next prime is 16978979203. The reversal of 16978979201 is 10297987961.

It can be written as a sum of positive squares in only one way, i.e., 13829524801 + 3149454400 = 117599^2 + 56120^2 .

It is not a de Polignac number, because 16978979201 - 2² = 16978979197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16978979203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16047656 + ... + 16048713.

It is an arithmetic number, because the mean of its divisors is an integer number (2958215435).

Almost surely, 2^16978979201 is an apocalyptic number.

It is an amenable number.

16978979201 is a deficient number, since it is larger than the sum of its proper divisors (770313409).

16978979201 is an equidigital number, since it uses as much as digits as its factorization.

16978979201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32096415 (or 32096392 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 59.

It can be divided in two parts, 1697 and 8979201, that added together give a palindrome (8980898).

The spelling of 16978979201 in words is "sixteen billion, nine hundred seventy-eight million, nine hundred seventy-nine thousand, two hundred one".