7208885257261 has 2 divisors, whose sum is σ = 7208885257262. Its totient is φ = 7208885257260.

The previous prime is 7208885257159. The next prime is 7208885257291. The reversal of 7208885257261 is 1627525888027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6442428781636 + 766456475625 = 2538194^2 + 875475^2 .

It is a cyclic number.

It is not a de Polignac number, because 7208885257261 - 2²⁷ = 7208751039533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7208885257261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7208885257291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3604442628630 + 3604442628631.

It is an arithmetic number, because the mean of its divisors is an integer number (3604442628631).

Almost surely, 2^{7208885257261} is an apocalyptic number.

It is an amenable number.

7208885257261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7208885257261 is an equidigital number, since it uses as much as digits as its factorization.

7208885257261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30105600, while the sum is 61.

The spelling of 7208885257261 in words is "seven trillion, two hundred eight billion, eight hundred eighty-five million, two hundred fifty-seven thousand, two hundred sixty-one".