11551555262401 has 16 divisors (see below), whose sum is σ = 14402116776960. Its totient is φ = 9001100800080.

The previous prime is 11551555262371. The next prime is 11551555262407. The reversal of 11551555262401 is 10426255515511.

It is a cyclic number.

It is not a de Polignac number, because 11551555262401 - 2³³ = 11542965327809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11551555262407) 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 15 ways as a sum of consecutive naturals, for example, 5655450 + ... + 7422076.

It is an arithmetic number, because the mean of its divisors is an integer number (900132298560).

Almost surely, 2^{11551555262401} is an apocalyptic number.

11551555262401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11551555262401 is a deficient number, since it is larger than the sum of its proper divisors (2850561514559).

11551555262401 is a wasteful number, since it uses less digits than its factorization.

11551555262401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851564.

The product of its (nonzero) digits is 300000, while the sum is 43.

The spelling of 11551555262401 in words is "eleven trillion, five hundred fifty-one billion, five hundred fifty-five million, two hundred sixty-two thousand, four hundred one".