7120055557 has 2 divisors, whose sum is σ = 7120055558. Its totient is φ = 7120055556.

The previous prime is 7120055543. The next prime is 7120055609. The reversal of 7120055557 is 7555500217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7118971876 + 1083681 = 84374^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 7120055557 - 2⁷ = 7120055429 is a prime.

It is a super-2 number, since 2×7120055557² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7120055507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3560027778 + 3560027779.

It is an arithmetic number, because the mean of its divisors is an integer number (3560027779).

Almost surely, 2^7120055557 is an apocalyptic number.

It is an amenable number.

7120055557 is a deficient number, since it is larger than the sum of its proper divisors (1).

7120055557 is an equidigital number, since it uses as much as digits as its factorization.

7120055557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61250, while the sum is 37.

The square root of 7120055557 is about 84380.4216450712. The cubic root of 7120055557 is about 1923.8053469747.

The spelling of 7120055557 in words is "seven billion, one hundred twenty million, fifty-five thousand, five hundred fifty-seven".