11978290837 has 2 divisors, whose sum is σ = 11978290838. Its totient is φ = 11978290836.

The previous prime is 11978290817. The next prime is 11978290843. The reversal of 11978290837 is 73809287911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11975143761 + 3147076 = 109431^2 + 1774^2 .

It is a cyclic number.

It is not a de Polignac number, because 11978290837 - 2¹⁵ = 11978258069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11978290817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5989145418 + 5989145419.

It is an arithmetic number, because the mean of its divisors is an integer number (5989145419).

Almost surely, 2^11978290837 is an apocalyptic number.

It is an amenable number.

11978290837 is a deficient number, since it is larger than the sum of its proper divisors (1).

11978290837 is an equidigital number, since it uses as much as digits as its factorization.

11978290837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 11978290837 in words is "eleven billion, nine hundred seventy-eight million, two hundred ninety thousand, eight hundred thirty-seven".