55309408550 has 72 divisors (see below), whose sum is σ = 113164376808. Its totient is φ = 20097158400.

The previous prime is 55309408549. The next prime is 55309408571. The reversal of 55309408550 is 5580490355.

It is a super-3 number, since 3×55309408550³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10566734 + ... + 10571966.

Almost surely, 2^55309408550 is an apocalyptic number.

55309408550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55309408550 is an abundant number, since it is smaller than the sum of its proper divisors (57854968258).

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

55309408550 is a wasteful number, since it uses less digits than its factorization.

55309408550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014 (or 6998 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 55309408550 in words is "fifty-five billion, three hundred nine million, four hundred eight thousand, five hundred fifty".