1681455864 has 32 divisors (see below), whose sum is σ = 4585789440. Its totient is φ = 509532000.

The previous prime is 1681455859. The next prime is 1681455869. The reversal of 1681455864 is 4685541861.

It is an interprime number because it is at equal distance from previous prime (1681455859) and next prime (1681455869).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681455869) 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 7 ways as a sum of consecutive naturals, for example, 3184312 + ... + 3184839.

It is an arithmetic number, because the mean of its divisors is an integer number (143305920).

Almost surely, 2^1681455864 is an apocalyptic number.

It is an amenable number.

1681455864 is an abundant number, since it is smaller than the sum of its proper divisors (2904333576).

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

1681455864 is a wasteful number, since it uses less digits than its factorization.

1681455864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6369171 (or 6369167 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 1681455864 is about 41005.5589402218. The cubic root of 1681455864 is about 1189.1276859302.

The spelling of 1681455864 in words is "one billion, six hundred eighty-one million, four hundred fifty-five thousand, eight hundred sixty-four".