55555555604989 has 32 divisors (see below), whose sum is σ = 64828061061120. Its totient is φ = 47049610924800.

The previous prime is 55555555604971. The next prime is 55555555605001. The reversal of 55555555604989 is 98940655555555.

It is a happy number.

It is not a de Polignac number, because 55555555604989 - 2³⁵ = 55521195866621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555555604959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5375092 + ... + 11832274.

It is an arithmetic number, because the mean of its divisors is an integer number (2025876908160).

Almost surely, 2^{55555555604989} is an apocalyptic number.

It is an amenable number.

55555555604989 is a deficient number, since it is larger than the sum of its proper divisors (9272505456131).

55555555604989 is a wasteful number, since it uses less digits than its factorization.

55555555604989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457681.

The product of its (nonzero) digits is 6075000000, while the sum is 76.

The spelling of 55555555604989 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred fifty-five million, six hundred four thousand, nine hundred eighty-nine".