11555312562361 has 4 divisors (see below), whose sum is σ = 11555450720500. Its totient is φ = 11555174404224.

The previous prime is 11555312562301. The next prime is 11555312562397. The reversal of 11555312562361 is 16326521355511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10877259128761 + 678053433600 = 3298069^2 + 823440^2 .

It is a cyclic number.

It is not a de Polignac number, because 11555312562361 - 2⁴³ = 2759219540153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11555312562301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68953536 + ... + 69120913.

It is an arithmetic number, because the mean of its divisors is an integer number (2888862680125).

Almost surely, 2^{11555312562361} is an apocalyptic number.

It is an amenable number.

11555312562361 is a deficient number, since it is larger than the sum of its proper divisors (138158139).

11555312562361 is an equidigital number, since it uses as much as digits as its factorization.

11555312562361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138158138.

The product of its digits is 810000, while the sum is 46.

The spelling of 11555312562361 in words is "eleven trillion, five hundred fifty-five billion, three hundred twelve million, five hundred sixty-two thousand, three hundred sixty-one".