3455521680 has 320 divisors, whose sum is σ = 12056728320. Its totient is φ = 812851200.

The previous prime is 3455521669. The next prime is 3455521691. The reversal of 3455521680 is 861255543.

It is an interprime number because it is at equal distance from previous prime (3455521669) and next prime (3455521691).

It is a hoax number, since the sum of its digits (39) 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 (39).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 16376775 + ... + 16376985.

It is an arithmetic number, because the mean of its divisors is an integer number (37677276).

Almost surely, 2^3455521680 is an apocalyptic number.

3455521680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3455521680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6028364160).

3455521680 is an abundant number, since it is smaller than the sum of its proper divisors (8601206640).

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

3455521680 is a wasteful number, since it uses less digits than its factorization.

3455521680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 3455521680 is about 58783.6854918097. The cubic root of 3455521680 is about 1511.8355060265.

The spelling of 3455521680 in words is "three billion, four hundred fifty-five million, five hundred twenty-one thousand, six hundred eighty".