16961167549 has 2 divisors, whose sum is σ = 16961167550. Its totient is φ = 16961167548.

The previous prime is 16961167519. The next prime is 16961167571. The reversal of 16961167549 is 94576116961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16089146649 + 872020900 = 126843^2 + 29530^2 .

It is a cyclic number.

It is not a de Polignac number, because 16961167549 - 2³³ = 8371232957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16961167549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16961167519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8480583774 + 8480583775.

It is an arithmetic number, because the mean of its divisors is an integer number (8480583775).

Almost surely, 2^16961167549 is an apocalyptic number.

It is an amenable number.

16961167549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16961167549 is an equidigital number, since it uses as much as digits as its factorization.

16961167549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The spelling of 16961167549 in words is "sixteen billion, nine hundred sixty-one million, one hundred sixty-seven thousand, five hundred forty-nine".