11554542320651 has 4 divisors (see below), whose sum is σ = 12604955258904. Its totient is φ = 10504129382400.

The previous prime is 11554542320647. The next prime is 11554542320677. The reversal of 11554542320651 is 15602324545511.

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 11554542320651 - 2² = 11554542320647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11554542326651) 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, 525206469110 + ... + 525206469131.

It is an arithmetic number, because the mean of its divisors is an integer number (3151238814726).

Almost surely, 2^{11554542320651} is an apocalyptic number.

11554542320651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11554542320651 is a deficient number, since it is larger than the sum of its proper divisors (1050412938253).

11554542320651 is a wasteful number, since it uses less digits than its factorization.

11554542320651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050412938252.

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 11554542320651 in words is "eleven trillion, five hundred fifty-four billion, five hundred forty-two million, three hundred twenty thousand, six hundred fifty-one".