7880087855977 has 2 divisors, whose sum is σ = 7880087855978. Its totient is φ = 7880087855976.

The previous prime is 7880087855911. The next prime is 7880087855999. The reversal of 7880087855977 is 7795587800887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7625639239936 + 254448616041 = 2761456^2 + 504429^2 .

It is a cyclic number.

It is not a de Polignac number, because 7880087855977 - 2²³ = 7880079467369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7880087855897 and 7880087855906.

It is not a weakly prime, because it can be changed into another prime (7880087855177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3940043927988 + 3940043927989.

It is an arithmetic number, because the mean of its divisors is an integer number (3940043927989).

Almost surely, 2^{7880087855977} is an apocalyptic number.

It is an amenable number.

7880087855977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7880087855977 is an equidigital number, since it uses as much as digits as its factorization.

7880087855977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2212761600, while the sum is 79.

The spelling of 7880087855977 in words is "seven trillion, eight hundred eighty billion, eighty-seven million, eight hundred fifty-five thousand, nine hundred seventy-seven".