2312605561551 has 4 divisors (see below), whose sum is σ = 3083474082072. Its totient is φ = 1541737041032.

The previous prime is 2312605561543. The next prime is 2312605561561. The reversal of 2312605561551 is 1551655062132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2312605561551 - 2³ = 2312605561543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312605561561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385434260256 + ... + 385434260261.

It is an arithmetic number, because the mean of its divisors is an integer number (770868520518).

Almost surely, 2^{2312605561551} is an apocalyptic number.

2312605561551 is a deficient number, since it is larger than the sum of its proper divisors (770868520521).

2312605561551 is an equidigital number, since it uses as much as digits as its factorization.

2312605561551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770868520520.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 2312605561551 in words is "two trillion, three hundred twelve billion, six hundred five million, five hundred sixty-one thousand, five hundred fifty-one".