961809610453 has 4 divisors (see below), whose sum is σ = 1018386646380. Its totient is φ = 905232574528.

The previous prime is 961809610451. The next prime is 961809610471. The reversal of 961809610453 is 354016908169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354016908169 = 19 ⋅18632468851.

It can be written as a sum of positive squares in 2 ways, for example, as 618421814404 + 343387796049 = 786398^2 + 585993^2 .

It is a cyclic number.

It is not a de Polignac number, because 961809610453 - 2¹ = 961809610451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 961809610453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961809610451) 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, 28288517938 + ... + 28288517971.

It is an arithmetic number, because the mean of its divisors is an integer number (254596661595).

Almost surely, 2^961809610453 is an apocalyptic number.

It is an amenable number.

961809610453 is a deficient number, since it is larger than the sum of its proper divisors (56577035927).

961809610453 is a wasteful number, since it uses less digits than its factorization.

961809610453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56577035926.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 961809610453 in words is "nine hundred sixty-one billion, eight hundred nine million, six hundred ten thousand, four hundred fifty-three".