11853343949 has 2 divisors, whose sum is σ = 11853343950. Its totient is φ = 11853343948.

The previous prime is 11853343907. The next prime is 11853343961. The reversal of 11853343949 is 94934335811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6290869225 + 5562474724 = 79315^2 + 74582^2 .

It is a cyclic number.

It is not a de Polignac number, because 11853343949 - 2³² = 7558376653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11853343897 and 11853343906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11853343969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5926671974 + 5926671975.

It is an arithmetic number, because the mean of its divisors is an integer number (5926671975).

Almost surely, 2^11853343949 is an apocalyptic number.

It is an amenable number.

11853343949 is a deficient number, since it is larger than the sum of its proper divisors (1).

11853343949 is an equidigital number, since it uses as much as digits as its factorization.

11853343949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 50.

The spelling of 11853343949 in words is "eleven billion, eight hundred fifty-three million, three hundred forty-three thousand, nine hundred forty-nine".