802477720061 has 4 divisors (see below), whose sum is σ = 810423044124. Its totient is φ = 794532396000.

The previous prime is 802477720003. The next prime is 802477720067. The reversal of 802477720061 is 160027774208.

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 699722212036 + 102755508025 = 836494^2 + 320555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802477720061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 802477719994 and 802477720021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802477720067) 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, 3972661880 + ... + 3972662081.

It is an arithmetic number, because the mean of its divisors is an integer number (202605761031).

Almost surely, 2^802477720061 is an apocalyptic number.

It is an amenable number.

802477720061 is a deficient number, since it is larger than the sum of its proper divisors (7945324063).

802477720061 is a wasteful number, since it uses less digits than its factorization.

802477720061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945324062.

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 802477720061 in words is "eight hundred two billion, four hundred seventy-seven million, seven hundred twenty thousand, sixty-one".