55601611555499 has 2 divisors, whose sum is σ = 55601611555500. Its totient is φ = 55601611555498.

The previous prime is 55601611555367. The next prime is 55601611555541. The reversal of 55601611555499 is 99455511610655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55601611555499 is a prime.

It is not a weakly prime, because it can be changed into another prime (55601611555099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27800805777749 + 27800805777750.

It is an arithmetic number, because the mean of its divisors is an integer number (27800805777750).

Almost surely, 2^{55601611555499} is an apocalyptic number.

55601611555499 is a deficient number, since it is larger than the sum of its proper divisors (1).

55601611555499 is an equidigital number, since it uses as much as digits as its factorization.

55601611555499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450000, while the sum is 62.

The spelling of 55601611555499 in words is "fifty-five trillion, six hundred one billion, six hundred eleven million, five hundred fifty-five thousand, four hundred ninety-nine".