63680894550 has 768 divisors, whose sum is σ = 226785484800. Its totient is φ = 12781670400.

The previous prime is 63680894549. The next prime is 63680894573. The reversal of 63680894550 is 5549808636.

It is a happy number.

63680894550 is a `hidden beast` number, since 6 + 3 + 6 + 8 + 0 + 89 + 4 + 550 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 236731816 + ... + 236732084.

It is an arithmetic number, because the mean of its divisors is an integer number (295293600).

Almost surely, 2^63680894550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63680894550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113392742400).

63680894550 is an abundant number, since it is smaller than the sum of its proper divisors (163104590250).

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

63680894550 is a wasteful number, since it uses less digits than its factorization.

63680894550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 63680894550 in words is "sixty-three billion, six hundred eighty million, eight hundred ninety-four thousand, five hundred fifty".