17620849856 has 28 divisors (see below), whose sum is σ = 35217948360. Its totient is φ = 8747036160.

The previous prime is 17620849849. The next prime is 17620849859. The reversal of 17620849856 is 65894802671.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (17620849859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981485 + ... + 999276.

It is an arithmetic number, because the mean of its divisors is an integer number (1257783870).

Almost surely, 2^17620849856 is an apocalyptic number.

17620849856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

17620849856 is a deficient number, since it is larger than the sum of its proper divisors (17597098504).

17620849856 is a wasteful number, since it uses less digits than its factorization.

17620849856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980912 (or 1980902 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 17620849856 in words is "seventeen billion, six hundred twenty million, eight hundred forty-nine thousand, eight hundred fifty-six".