55321946000640 has 216 divisors, whose sum is σ = 208808913706848. Its totient is φ = 13411380817920.

The previous prime is 55321946000617. The next prime is 55321946000707. The reversal of 55321946000640 is 4600064912355.

55321946000640 is a `hidden beast` number, since 5 + 5 + 32 + 1 + 9 + 4 + 600 + 0 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218157474 + ... + 218410913.

It is an arithmetic number, because the mean of its divisors is an integer number (966707933828).

Almost surely, 2^{55321946000640} is an apocalyptic number.

It is an amenable number.

55321946000640 is an abundant number, since it is smaller than the sum of its proper divisors (153486967706208).

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

55321946000640 is a wasteful number, since it uses less digits than its factorization.

55321946000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436568425 (or 436568408 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 55321946000640 in words is "fifty-five trillion, three hundred twenty-one billion, nine hundred forty-six million, six hundred forty", and thus it is an aban number.