11551542663499 has 2 divisors, whose sum is σ = 11551542663500. Its totient is φ = 11551542663498.

The previous prime is 11551542663481. The next prime is 11551542663571. The reversal of 11551542663499 is 99436624515511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11551542663499 - 2⁷ = 11551542663371 is a prime.

It is a super-2 number, since 2×11551542663499² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11551542663299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775771331749 + 5775771331750.

It is an arithmetic number, because the mean of its divisors is an integer number (5775771331750).

Almost surely, 2^{11551542663499} is an apocalyptic number.

11551542663499 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551542663499 is an equidigital number, since it uses as much as digits as its factorization.

11551542663499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992000, while the sum is 61.

The spelling of 11551542663499 in words is "eleven trillion, five hundred fifty-one billion, five hundred forty-two million, six hundred sixty-three thousand, four hundred ninety-nine".