7711221457 has 2 divisors, whose sum is σ = 7711221458. Its totient is φ = 7711221456.

The previous prime is 7711221451. The next prime is 7711221461. The reversal of 7711221457 is 7541221177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6102890641 + 1608330816 = 78121^2 + 40104^2 .

It is a cyclic number.

It is not a de Polignac number, because 7711221457 - 2¹⁵ = 7711188689 is a prime.

It is not a weakly prime, because it can be changed into another prime (7711221451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3855610728 + 3855610729.

It is an arithmetic number, because the mean of its divisors is an integer number (3855610729).

Almost surely, 2^7711221457 is an apocalyptic number.

It is an amenable number.

7711221457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7711221457 is an equidigital number, since it uses as much as digits as its factorization.

7711221457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27440, while the sum is 37.

The square root of 7711221457 is about 87813.5607807815. The cubic root of 7711221457 is about 1975.6396118401.

The spelling of 7711221457 in words is "seven billion, seven hundred eleven million, two hundred twenty-one thousand, four hundred fifty-seven".