11261421601551 has 24 divisors (see below), whose sum is σ = 17755069288320. Its totient is φ = 6821335198800.

The previous prime is 11261421601537. The next prime is 11261421601559. The reversal of 11261421601551 is 15510612416211.

11261421601551 is a `hidden beast` number, since 1 + 1 + 2 + 6 + 1 + 42 + 1 + 60 + 1 + 551 = 666.

It is not a de Polignac number, because 11261421601551 - 2¹¹ = 11261421599503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261421601559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31226491 + ... + 31585068.

It is an arithmetic number, because the mean of its divisors is an integer number (739794553680).

Almost surely, 2^{11261421601551} is an apocalyptic number.

11261421601551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11261421601551 is a deficient number, since it is larger than the sum of its proper divisors (6493647686769).

11261421601551 is a wasteful number, since it uses less digits than its factorization.

11261421601551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62813387 (or 62813384 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The spelling of 11261421601551 in words is "eleven trillion, two hundred sixty-one billion, four hundred twenty-one million, six hundred one thousand, five hundred fifty-one".