55555352420 has 48 divisors (see below), whose sum is σ = 119768835648. Its totient is φ = 21634542720.

The previous prime is 55555352393. The next prime is 55555352449. The reversal of 55555352420 is 2425355555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158810 + ... + 369230.

It is an arithmetic number, because the mean of its divisors is an integer number (2495184076).

Almost surely, 2^55555352420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555352420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59884417824).

55555352420 is an abundant number, since it is smaller than the sum of its proper divisors (64213483228).

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

55555352420 is a wasteful number, since it uses less digits than its factorization.

55555352420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210780 (or 210778 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 41.

The spelling of 55555352420 in words is "fifty-five billion, five hundred fifty-five million, three hundred fifty-two thousand, four hundred twenty".