11620278775609 has 81 divisors (see below), whose sum is σ = 14622679812069. Its totient is φ = 9206357474160.

The previous prime is 11620278775597. The next prime is 11620278775639. The reversal of 11620278775609 is 90657787202611.

The square root of 11620278775609 is 3408853.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 11620278775609 - 2⁵ = 11620278775577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11620278775639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 17013584982 + ... + 17013585664.

Almost surely, 2^{11620278775609} is an apocalyptic number.

11620278775609 is the 3408853-rd square number.

11620278775609 is the 1704427-th centered octagonal number.

It is an amenable number.

11620278775609 is a deficient number, since it is larger than the sum of its proper divisors (3002401036460).

11620278775609 is an frugal number, since it uses more digits than its factorization.

11620278775609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 11620278775609 in words is "eleven trillion, six hundred twenty billion, two hundred seventy-eight million, seven hundred seventy-five thousand, six hundred nine".