7890221118953 has 2 divisors, whose sum is σ = 7890221118954. Its totient is φ = 7890221118952.

The previous prime is 7890221118917. The next prime is 7890221118973. The reversal of 7890221118953 is 3598111220987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7653118346329 + 237102772624 = 2766427^2 + 486932^2 .

It is a cyclic number.

It is not a de Polignac number, because 7890221118953 - 2¹⁸ = 7890220856809 is a prime.

It is not a weakly prime, because it can be changed into another prime (7890221118973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3945110559476 + 3945110559477.

It is an arithmetic number, because the mean of its divisors is an integer number (3945110559477).

Almost surely, 2^{7890221118953} is an apocalyptic number.

It is an amenable number.

7890221118953 is a deficient number, since it is larger than the sum of its proper divisors (1).

7890221118953 is an equidigital number, since it uses as much as digits as its factorization.

7890221118953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 7890221118953 in words is "seven trillion, eight hundred ninety billion, two hundred twenty-one million, one hundred eighteen thousand, nine hundred fifty-three".