7161707387557 has 2 divisors, whose sum is σ = 7161707387558. Its totient is φ = 7161707387556.

The previous prime is 7161707387507. The next prime is 7161707387563. The reversal of 7161707387557 is 7557837071617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5123020301281 + 2038687086276 = 2263409^2 + 1427826^2 .

It is a cyclic number.

It is not a de Polignac number, because 7161707387557 - 2¹¹ = 7161707385509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7161707387507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3580853693778 + 3580853693779.

It is an arithmetic number, because the mean of its divisors is an integer number (3580853693779).

Almost surely, 2^{7161707387557} is an apocalyptic number.

It is an amenable number.

7161707387557 is a deficient number, since it is larger than the sum of its proper divisors (1).

7161707387557 is an equidigital number, since it uses as much as digits as its factorization.

7161707387557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60505200, while the sum is 64.

The spelling of 7161707387557 in words is "seven trillion, one hundred sixty-one billion, seven hundred seven million, three hundred eighty-seven thousand, five hundred fifty-seven".