2616551557 has 2 divisors, whose sum is σ = 2616551558. Its totient is φ = 2616551556.

The previous prime is 2616551537. The next prime is 2616551611. The reversal of 2616551557 is 7551556162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2527173441 + 89378116 = 50271^2 + 9454^2 .

It is a cyclic number.

It is not a de Polignac number, because 2616551557 - 2³¹ = 469067909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2616551537) 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, 1308275778 + 1308275779.

It is an arithmetic number, because the mean of its divisors is an integer number (1308275779).

Almost surely, 2^2616551557 is an apocalyptic number.

It is an amenable number.

2616551557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2616551557 is an equidigital number, since it uses as much as digits as its factorization.

2616551557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 315000, while the sum is 43.

The square root of 2616551557 is about 51152.2390223537. The cubic root of 2616551557 is about 1377.9805856917.

The spelling of 2616551557 in words is "two billion, six hundred sixteen million, five hundred fifty-one thousand, five hundred fifty-seven".