802456491 has 16 divisors (see below), whose sum is σ = 1133574048. Its totient is φ = 503193600.

The previous prime is 802456489. The next prime is 802456519. The reversal of 802456491 is 194654208.

It is not a de Polignac number, because 802456491 - 2¹ = 802456489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (802456471) 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, 102351 + ... + 109911.

It is an arithmetic number, because the mean of its divisors is an integer number (70848378).

Almost surely, 2^802456491 is an apocalyptic number.

802456491 is a deficient number, since it is larger than the sum of its proper divisors (331117557).

802456491 is a wasteful number, since it uses less digits than its factorization.

802456491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9662.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 802456491 is about 28327.6629992663. The cubic root of 802456491 is about 929.2669642777.

It can be divided in two parts, 80245 and 6491, that added together give a triangular number (86736 = T₄₁₆).

The spelling of 802456491 in words is "eight hundred two million, four hundred fifty-six thousand, four hundred ninety-one".