16035657961 has 4 divisors (see below), whose sum is σ = 16036194132. Its totient is φ = 16035121792.

The previous prime is 16035657893. The next prime is 16035657973. The reversal of 16035657961 is 16975653061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12352988736 + 3682669225 = 111144^2 + 60685^2 .

It is a cyclic number.

It is not a de Polignac number, because 16035657961 - 2¹⁷ = 16035526889 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16035657061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220396 + ... + 283981.

It is an arithmetic number, because the mean of its divisors is an integer number (4009048533).

Almost surely, 2^16035657961 is an apocalyptic number.

It is an amenable number.

16035657961 is a deficient number, since it is larger than the sum of its proper divisors (536171).

16035657961 is an equidigital number, since it uses as much as digits as its factorization.

16035657961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536170.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 16035657961 in words is "sixteen billion, thirty-five million, six hundred fifty-seven thousand, nine hundred sixty-one".