836480355521 has 2 divisors, whose sum is σ = 836480355522. Its totient is φ = 836480355520.

The previous prime is 836480355499. The next prime is 836480355563. The reversal of 836480355521 is 125553084638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573254922496 + 263225433025 = 757136^2 + 513055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-836480355521 is a prime.

It is a super-3 number, since 3×836480355521³ (a number of 37 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 836480355521.

It is not a weakly prime, because it can be changed into another prime (836480355721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418240177760 + 418240177761.

It is an arithmetic number, because the mean of its divisors is an integer number (418240177761).

Almost surely, 2^836480355521 is an apocalyptic number.

It is an amenable number.

836480355521 is a deficient number, since it is larger than the sum of its proper divisors (1).

836480355521 is an equidigital number, since it uses as much as digits as its factorization.

836480355521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456000, while the sum is 50.

The spelling of 836480355521 in words is "eight hundred thirty-six billion, four hundred eighty million, three hundred fifty-five thousand, five hundred twenty-one".