53664434550 has 48 divisors (see below), whose sum is σ = 147875334480. Its totient is φ = 14310515520.

The previous prime is 53664434539. The next prime is 53664434567. The reversal of 53664434550 is 5543446635.

53664434550 is a `hidden beast` number, since 5 + 3 + 6 + 64 + 4 + 34 + 550 = 666.

It is a hoax number, since the sum of its digits (45) 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 (45).

It is a junction number, because it is equal to n+sod(n) for n = 53664434496 and 53664434505.

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, 19874367 + ... + 19877066.

It is an arithmetic number, because the mean of its divisors is an integer number (3080736135).

Almost surely, 2^53664434550 is an apocalyptic number.

53664434550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

53664434550 is an abundant number, since it is smaller than the sum of its proper divisors (94210899930).

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

53664434550 is a wasteful number, since it uses less digits than its factorization.

53664434550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39751454 (or 39751443 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 45.

The spelling of 53664434550 in words is "fifty-three billion, six hundred sixty-four million, four hundred thirty-four thousand, five hundred fifty".