11618812547 has 2 divisors, whose sum is σ = 11618812548. Its totient is φ = 11618812546.

The previous prime is 11618812523. The next prime is 11618812553. The reversal of 11618812547 is 74521881611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11618812547 - 2¹⁸ = 11618550403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11618812498 and 11618812507.

It is not a weakly prime, because it can be changed into another prime (11618812507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809406273 + 5809406274.

It is an arithmetic number, because the mean of its divisors is an integer number (5809406274).

Almost surely, 2^11618812547 is an apocalyptic number.

11618812547 is a deficient number, since it is larger than the sum of its proper divisors (1).

11618812547 is an equidigital number, since it uses as much as digits as its factorization.

11618812547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 44.

The spelling of 11618812547 in words is "eleven billion, six hundred eighteen million, eight hundred twelve thousand, five hundred forty-seven".