55505505505020 has 96 divisors (see below), whose sum is σ = 155522047887360. Its totient is φ = 14791315776000.

The previous prime is 55505505505001. The next prime is 55505505505027. The reversal of 55505505505020 is 2050550550555.

It is a super-2 number, since 2×55505505505020² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505505505027) 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, 613688961 + ... + 613779399.

It is an arithmetic number, because the mean of its divisors is an integer number (1620021332160).

Almost surely, 2^{55505505505020} is an apocalyptic number.

It is an amenable number.

55505505505020 is an abundant number, since it is smaller than the sum of its proper divisors (100016542382340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55505505505020 is a wasteful number, since it uses less digits than its factorization.

55505505505020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97355 (or 97353 counting only the distinct ones).

The product of its (nonzero) digits is 781250, while the sum is 42.

The spelling of 55505505505020 in words is "fifty-five trillion, five hundred five billion, five hundred five million, five hundred five thousand, twenty".