73806563819 has 2 divisors, whose sum is σ = 73806563820. Its totient is φ = 73806563818.

The previous prime is 73806563801. The next prime is 73806563833. The reversal of 73806563819 is 91836560837.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73806563819 is a prime.

It is a super-2 number, since 2×73806563819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73806563119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36903281909 + 36903281910.

It is an arithmetic number, because the mean of its divisors is an integer number (36903281910).

Almost surely, 2^73806563819 is an apocalyptic number.

73806563819 is a deficient number, since it is larger than the sum of its proper divisors (1).

73806563819 is an equidigital number, since it uses as much as digits as its factorization.

73806563819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 73806563819 in words is "seventy-three billion, eight hundred six million, five hundred sixty-three thousand, eight hundred nineteen".