287653414913261 has 2 divisors, whose sum is σ = 287653414913262. Its totient is φ = 287653414913260.

The previous prime is 287653414913243. The next prime is 287653414913281. The reversal of 287653414913261 is 162319414356782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144434871827236 + 143218543086025 = 12018106^2 + 11967395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287653414913261 is a prime.

It is a super-2 number, since 2×287653414913261² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 287653414913194 and 287653414913203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287653414913281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143826707456630 + 143826707456631.

It is an arithmetic number, because the mean of its divisors is an integer number (143826707456631).

Almost surely, 2^{287653414913261} is an apocalyptic number.

It is an amenable number.

287653414913261 is a deficient number, since it is larger than the sum of its proper divisors (1).

287653414913261 is an equidigital number, since it uses as much as digits as its factorization.

287653414913261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 62.

The spelling of 287653414913261 in words is "two hundred eighty-seven trillion, six hundred fifty-three billion, four hundred fourteen million, nine hundred thirteen thousand, two hundred sixty-one".