7616217881 has 2 divisors, whose sum is σ = 7616217882. Its totient is φ = 7616217880.

The previous prime is 7616217799. The next prime is 7616217937. The reversal of 7616217881 is 1887126167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7553174281 + 63043600 = 86909^2 + 7940^2 .

It is a cyclic number.

It is not a de Polignac number, because 7616217881 - 2¹⁰ = 7616216857 is a prime.

It is a super-2 number, since 2×7616217881² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7616217181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3808108940 + 3808108941.

It is an arithmetic number, because the mean of its divisors is an integer number (3808108941).

Almost surely, 2^7616217881 is an apocalyptic number.

It is an amenable number.

7616217881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7616217881 is an equidigital number, since it uses as much as digits as its factorization.

7616217881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 47.

The square root of 7616217881 is about 87270.9452280655. The cubic root of 7616217881 is about 1967.4926556485.

The spelling of 7616217881 in words is "seven billion, six hundred sixteen million, two hundred seventeen thousand, eight hundred eighty-one".