1681355548 has 12 divisors (see below), whose sum is σ = 2942664480. Its totient is φ = 840594272.

The previous prime is 1681355479. The next prime is 1681355549. The reversal of 1681355548 is 8455531861.

It is a junction number, because it is equal to n+sod(n) for n = 1681355498 and 1681355507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681355549) 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, 55368 + ... + 80176.

It is an arithmetic number, because the mean of its divisors is an integer number (245222040).

Almost surely, 2^1681355548 is an apocalyptic number.

It is an amenable number.

1681355548 is a deficient number, since it is larger than the sum of its proper divisors (1261308932).

1681355548 is a wasteful number, since it uses less digits than its factorization.

1681355548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41756 (or 41754 counting only the distinct ones).

The product of its digits is 576000, while the sum is 46.

The square root of 1681355548 is about 41004.3357219697. The cubic root of 1681355548 is about 1189.1040375931.

It can be divided in two parts, 16813 and 55548, that added together give a square (72361 = 269²).

The spelling of 1681355548 in words is "one billion, six hundred eighty-one million, three hundred fifty-five thousand, five hundred forty-eight".