11779628557 has 2 divisors, whose sum is σ = 11779628558. Its totient is φ = 11779628556.

The previous prime is 11779628551. The next prime is 11779628561. The reversal of 11779628557 is 75582697711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11744273641 + 35354916 = 108371^2 + 5946^2 .

It is a cyclic number.

It is not a de Polignac number, because 11779628557 - 2¹⁹ = 11779104269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11779628551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889814278 + 5889814279.

It is an arithmetic number, because the mean of its divisors is an integer number (5889814279).

Almost surely, 2^11779628557 is an apocalyptic number.

It is an amenable number.

11779628557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11779628557 is an equidigital number, since it uses as much as digits as its factorization.

11779628557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7408800, while the sum is 58.

The spelling of 11779628557 in words is "eleven billion, seven hundred seventy-nine million, six hundred twenty-eight thousand, five hundred fifty-seven".