55521205392 has 80 divisors (see below), whose sum is σ = 143869541760. Its totient is φ = 18450432000.

The previous prime is 55521205391. The next prime is 55521205409. The reversal of 55521205392 is 29350212555.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55521205392.

It is not an unprimeable number, because it can be changed into a prime (55521205391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39403984 + ... + 39405392.

It is an arithmetic number, because the mean of its divisors is an integer number (1798369272).

Almost surely, 2^55521205392 is an apocalyptic number.

It is an amenable number.

55521205392 is an abundant number, since it is smaller than the sum of its proper divisors (88348336368).

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

55521205392 is a wasteful number, since it uses less digits than its factorization.

55521205392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352 (or 3346 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 55521205392 in words is "fifty-five billion, five hundred twenty-one million, two hundred five thousand, three hundred ninety-two".