76209538849 has 2 divisors, whose sum is σ = 76209538850. Its totient is φ = 76209538848.

The previous prime is 76209538813. The next prime is 76209538871. The reversal of 76209538849 is 94883590267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75325547025 + 883991824 = 274455^2 + 29732^2 .

It is an emirp because it is prime and its reverse (94883590267) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76209538849 - 2⁷ = 76209538721 is a prime.

It is not a weakly prime, because it can be changed into another prime (76209538549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38104769424 + 38104769425.

It is an arithmetic number, because the mean of its divisors is an integer number (38104769425).

Almost surely, 2^76209538849 is an apocalyptic number.

It is an amenable number.

76209538849 is a deficient number, since it is larger than the sum of its proper divisors (1).

76209538849 is an equidigital number, since it uses as much as digits as its factorization.

76209538849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 76209538849 in words is "seventy-six billion, two hundred nine million, five hundred thirty-eight thousand, eight hundred forty-nine".