11942420849 has 2 divisors, whose sum is σ = 11942420850. Its totient is φ = 11942420848.

The previous prime is 11942420843. The next prime is 11942420863. The reversal of 11942420849 is 94802424911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9088190224 + 2854230625 = 95332^2 + 53425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11942420849 is a prime.

It is not a weakly prime, because it can be changed into another prime (11942420843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5971210424 + 5971210425.

It is an arithmetic number, because the mean of its divisors is an integer number (5971210425).

Almost surely, 2^11942420849 is an apocalyptic number.

It is an amenable number.

11942420849 is a deficient number, since it is larger than the sum of its proper divisors (1).

11942420849 is an equidigital number, since it uses as much as digits as its factorization.

11942420849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 11942420849 in words is "eleven billion, nine hundred forty-two million, four hundred twenty thousand, eight hundred forty-nine".