55405012650 has 48 divisors (see below), whose sum is σ = 147974008224. Its totient is φ = 13638156480.

The previous prime is 55405012627. The next prime is 55405012667. The reversal of 55405012650 is 5621050455.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14204464 + ... + 14208363.

It is an arithmetic number, because the mean of its divisors is an integer number (3082791838).

Almost surely, 2^55405012650 is an apocalyptic number.

55405012650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55405012650 is an abundant number, since it is smaller than the sum of its proper divisors (92568995574).

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

55405012650 is a wasteful number, since it uses less digits than its factorization.

55405012650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28412855 (or 28412850 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 55405012650 in words is "fifty-five billion, four hundred five million, twelve thousand, six hundred fifty".