65453961 has 16 divisors (see below), whose sum is σ = 92591424. Its totient is φ = 40986624.

The previous prime is 65453953. The next prime is 65453963. The reversal of 65453961 is 16935456.

65453961 is a nontrivial binomial coefficient, being equal to C(11442, 2).

It is not a de Polignac number, because 65453961 - 2³ = 65453953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65453963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33370 + ... + 35276.

It is an arithmetic number, because the mean of its divisors is an integer number (5786964).

Almost surely, 2^65453961 is an apocalyptic number.

65453961 is the 11441-st triangular number and also the 5721-st hexagonal number.

It is an amenable number.

65453961 is a deficient number, since it is larger than the sum of its proper divisors (27137463).

65453961 is a wasteful number, since it uses less digits than its factorization.

65453961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600.

The product of its digits is 97200, while the sum is 39.

The square root of 65453961 is about 8090.3622292206. The cubic root of 65453961 is about 403.0064322174.

It can be divided in two parts, 654 and 53961, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 65453961 in words is "sixty-five million, four hundred fifty-three thousand, nine hundred sixty-one".