16961223508 has 6 divisors (see below), whose sum is σ = 29682141146. Its totient is φ = 8480611752.

The previous prime is 16961223497. The next prime is 16961223551. The reversal of 16961223508 is 80532216961.

It can be written as a sum of positive squares in only one way, i.e., 16791494724 + 169728784 = 129582^2 + 13028^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2120152935 + ... + 2120152942.

Almost surely, 2^16961223508 is an apocalyptic number.

It is an amenable number.

16961223508 is a deficient number, since it is larger than the sum of its proper divisors (12720917638).

16961223508 is a wasteful number, since it uses less digits than its factorization.

16961223508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240305881 (or 4240305879 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 16961223508 in words is "sixteen billion, nine hundred sixty-one million, two hundred twenty-three thousand, five hundred eight".