2611963553 has 2 divisors, whose sum is σ = 2611963554. Its totient is φ = 2611963552.

The previous prime is 2611963547. The next prime is 2611963609. The reversal of 2611963553 is 3553691162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1835951104 + 776012449 = 42848^2 + 27857^2 .

It is a cyclic number.

It is not a de Polignac number, because 2611963553 - 2⁴ = 2611963537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2611963553.

It is not a weakly prime, because it can be changed into another prime (2611963253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305981776 + 1305981777.

It is an arithmetic number, because the mean of its divisors is an integer number (1305981777).

Almost surely, 2^2611963553 is an apocalyptic number.

It is an amenable number.

2611963553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2611963553 is an equidigital number, since it uses as much as digits as its factorization.

2611963553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 41.

The square root of 2611963553 is about 51107.3727851472. The cubic root of 2611963553 is about 1377.1747057484.

The spelling of 2611963553 in words is "two billion, six hundred eleven million, nine hundred sixty-three thousand, five hundred fifty-three".