802611963553 has 4 divisors (see below), whose sum is σ = 815769536788. Its totient is φ = 789454390320.

The previous prime is 802611963539. The next prime is 802611963649. The reversal of 802611963553 is 355369116208.

It is a happy number.

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 302772861504 + 499839102049 = 550248^2 + 706993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802611963553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 802611963497 and 802611963506.

It is not an unprimeable number, because it can be changed into a prime (802611963533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6578786526 + ... + 6578786647.

It is an arithmetic number, because the mean of its divisors is an integer number (203942384197).

Almost surely, 2^802611963553 is an apocalyptic number.

It is an amenable number.

802611963553 is a deficient number, since it is larger than the sum of its proper divisors (13157573235).

802611963553 is a wasteful number, since it uses less digits than its factorization.

802611963553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13157573234.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 802611963553 in words is "eight hundred two billion, six hundred eleven million, nine hundred sixty-three thousand, five hundred fifty-three".