7976550556397 has 2 divisors, whose sum is σ = 7976550556398. Its totient is φ = 7976550556396.

The previous prime is 7976550556313. The next prime is 7976550556399. The reversal of 7976550556397 is 7936550556797.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4687510784356 + 3289039772041 = 2165066^2 + 1813571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7976550556397 is a prime.

Together with 7976550556399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7976550556399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988275278198 + 3988275278199.

It is an arithmetic number, because the mean of its divisors is an integer number (3988275278199).

Almost surely, 2^{7976550556397} is an apocalyptic number.

It is an amenable number.

7976550556397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7976550556397 is an equidigital number, since it uses as much as digits as its factorization.

7976550556397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1875352500, while the sum is 74.

The spelling of 7976550556397 in words is "seven trillion, nine hundred seventy-six billion, five hundred fifty million, five hundred fifty-six thousand, three hundred ninety-seven".