1680451893 has 32 divisors (see below), whose sum is σ = 2580412800. Its totient is φ = 1079568000.

The previous prime is 1680451891. The next prime is 1680451907. The reversal of 1680451893 is 3981540861.

It is not a de Polignac number, because 1680451893 - 2¹ = 1680451891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680451891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468798 + ... + 472368.

It is an arithmetic number, because the mean of its divisors is an integer number (80637900).

Almost surely, 2^1680451893 is an apocalyptic number.

It is an amenable number.

1680451893 is a deficient number, since it is larger than the sum of its proper divisors (899960907).

1680451893 is a wasteful number, since it uses less digits than its factorization.

1680451893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 4204 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1680451893 is about 40993.3152233385. The cubic root of 1680451893 is about 1188.8909689624.

The spelling of 1680451893 in words is "one billion, six hundred eighty million, four hundred fifty-one thousand, eight hundred ninety-three".