11551236461551 has 2 divisors, whose sum is σ = 11551236461552. Its totient is φ = 11551236461550.

The previous prime is 11551236461491. The next prime is 11551236461581. The reversal of 11551236461551 is 15516463215511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11551236461551 - 2⁷ = 11551236461423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11551236461581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775618230775 + 5775618230776.

It is an arithmetic number, because the mean of its divisors is an integer number (5775618230776).

Almost surely, 2^{11551236461551} is an apocalyptic number.

11551236461551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551236461551 is an equidigital number, since it uses as much as digits as its factorization.

11551236461551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540000, while the sum is 46.

The spelling of 11551236461551 in words is "eleven trillion, five hundred fifty-one billion, two hundred thirty-six million, four hundred sixty-one thousand, five hundred fifty-one".