55518990830605 has 16 divisors (see below), whose sum is σ = 67298952443904. Its totient is φ = 43965995935680.

The previous prime is 55518990830603. The next prime is 55518990830609. The reversal of 55518990830605 is 50603809981555.

It is not a de Polignac number, because 55518990830605 - 2¹ = 55518990830603 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 (55518990830603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98399826 + ... + 98962435.

It is an arithmetic number, because the mean of its divisors is an integer number (4206184527744).

Almost surely, 2^{55518990830605} is an apocalyptic number.

It is an amenable number.

55518990830605 is a deficient number, since it is larger than the sum of its proper divisors (11779961613299).

55518990830605 is a wasteful number, since it uses less digits than its factorization.

55518990830605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197362836.

The product of its (nonzero) digits is 58320000, while the sum is 64.

The spelling of 55518990830605 in words is "fifty-five trillion, five hundred eighteen billion, nine hundred ninety million, eight hundred thirty thousand, six hundred five".