55554999999 has 4 divisors (see below), whose sum is σ = 74073333336. Its totient is φ = 37036666664.

The previous prime is 55554999979. The next prime is 55555000021. The reversal of 55554999999 is 99999945555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55554999999 is a prime.

55554999999 is a modest number, since divided by 999999 gives 55554 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55554999919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9259166664 + ... + 9259166669.

It is an arithmetic number, because the mean of its divisors is an integer number (18518333334).

Almost surely, 2^55554999999 is an apocalyptic number.

55554999999 is a deficient number, since it is larger than the sum of its proper divisors (18518333337).

55554999999 is a wasteful number, since it uses less digits than its factorization.

55554999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18518333336.

The product of its digits is 1328602500, while the sum is 78.

The spelling of 55554999999 in words is "fifty-five billion, five hundred fifty-four million, nine hundred ninety-nine thousand, nine hundred ninety-nine".