55221646460 has 12 divisors (see below), whose sum is σ = 115965457608. Its totient is φ = 22088658576.

The previous prime is 55221646451. The next prime is 55221646471. The reversal of 55221646460 is 6464612255.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380541142 + ... + 1380541181.

It is an arithmetic number, because the mean of its divisors is an integer number (9663788134).

Almost surely, 2^55221646460 is an apocalyptic number.

It is an amenable number.

55221646460 is an abundant number, since it is smaller than the sum of its proper divisors (60743811148).

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

55221646460 is a wasteful number, since it uses less digits than its factorization.

55221646460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761082332 (or 2761082330 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 55221646460 in words is "fifty-five billion, two hundred twenty-one million, six hundred forty-six thousand, four hundred sixty".