55506099619 has 2 divisors, whose sum is σ = 55506099620. Its totient is φ = 55506099618.

The previous prime is 55506099581. The next prime is 55506099637. The reversal of 55506099619 is 91699060555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55506099619 - 2⁷ = 55506099491 is a prime.

It is a super-2 number, since 2×55506099619² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55506099619.

It is not a weakly prime, because it can be changed into another prime (55506099419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27753049809 + 27753049810.

It is an arithmetic number, because the mean of its divisors is an integer number (27753049810).

Almost surely, 2^55506099619 is an apocalyptic number.

55506099619 is a deficient number, since it is larger than the sum of its proper divisors (1).

55506099619 is an equidigital number, since it uses as much as digits as its factorization.

55506099619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3280500, while the sum is 55.

The spelling of 55506099619 in words is "fifty-five billion, five hundred six million, ninety-nine thousand, six hundred nineteen".