55551565579 has 2 divisors, whose sum is σ = 55551565580. Its totient is φ = 55551565578.

The previous prime is 55551565561. The next prime is 55551565621. The reversal of 55551565579 is 97556515555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55551565579 - 2⁹ = 55551565067 is a prime.

It is not a weakly prime, because it can be changed into another prime (55551565519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775782789 + 27775782790.

It is an arithmetic number, because the mean of its divisors is an integer number (27775782790).

Almost surely, 2^55551565579 is an apocalyptic number.

55551565579 is a deficient number, since it is larger than the sum of its proper divisors (1).

55551565579 is an equidigital number, since it uses as much as digits as its factorization.

55551565579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29531250, while the sum is 58.

The spelling of 55551565579 in words is "fifty-five billion, five hundred fifty-one million, five hundred sixty-five thousand, five hundred seventy-nine".