802262161721 has 4 divisors (see below), whose sum is σ = 802406536932. Its totient is φ = 802117786512.

The previous prime is 802262161703. The next prime is 802262161769. The reversal of 802262161721 is 127161262208.

802262161721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 432452227321 + 369809934400 = 657611^2 + 608120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802262161721 is a prime.

It is a super-2 number, since 2×802262161721² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (802262161321) 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, 72179270 + ... + 72190383.

It is an arithmetic number, because the mean of its divisors is an integer number (200601634233).

Almost surely, 2^802262161721 is an apocalyptic number.

It is an amenable number.

802262161721 is a deficient number, since it is larger than the sum of its proper divisors (144375211).

802262161721 is a wasteful number, since it uses less digits than its factorization.

802262161721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144375210.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 802262161721 in words is "eight hundred two billion, two hundred sixty-two million, one hundred sixty-one thousand, seven hundred twenty-one".