55515220004444 has 24 divisors (see below), whose sum is σ = 102878650693728. Its totient is φ = 26121707540480.

The previous prime is 55515220004429. The next prime is 55515220004521. The reversal of 55515220004444 is 44440002251555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47889797 + ... + 49035324.

It is an arithmetic number, because the mean of its divisors is an integer number (4286610445572).

Almost surely, 2^{55515220004444} is an apocalyptic number.

It is an amenable number.

55515220004444 is a deficient number, since it is larger than the sum of its proper divisors (47363430689284).

55515220004444 is a wasteful number, since it uses less digits than its factorization.

55515220004444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96933565 (or 96933563 counting only the distinct ones).

The product of its (nonzero) digits is 640000, while the sum is 41.

Adding to 55515220004444 its reverse (44440002251555), we get a palindrome (99955222255999).

The spelling of 55515220004444 in words is "fifty-five trillion, five hundred fifteen billion, two hundred twenty million, four thousand, four hundred forty-four".