17790057856 has 16 divisors (see below), whose sum is σ = 35441131140. Its totient is φ = 8895028864.

The previous prime is 17790057851. The next prime is 17790057863. The reversal of 17790057856 is 65875009771.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 17790057797 and 17790057806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17790057851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69492286 + ... + 69492541.

Almost surely, 2^17790057856 is an apocalyptic number.

17790057856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

17790057856 is a deficient number, since it is larger than the sum of its proper divisors (17651073284).

17790057856 is an equidigital number, since it uses as much as digits as its factorization.

17790057856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138984841 (or 138984829 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 55.

The spelling of 17790057856 in words is "seventeen billion, seven hundred ninety million, fifty-seven thousand, eight hundred fifty-six".