1675721718 has 96 divisors (see below), whose sum is σ = 4153773312. Its totient is φ = 483278400.

The previous prime is 1675721683. The next prime is 1675721731. The reversal of 1675721718 is 8171275761.

1675721718 is a `hidden beast` number, since 1 + 6 + 7 + 572 + 1 + 71 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1032948 + ... + 1034568.

It is an arithmetic number, because the mean of its divisors is an integer number (43268472).

Almost surely, 2^1675721718 is an apocalyptic number.

1675721718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1675721718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2076886656).

1675721718 is an abundant number, since it is smaller than the sum of its proper divisors (2478051594).

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

1675721718 is a wasteful number, since it uses less digits than its factorization.

1675721718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1887 counting only the distinct ones).

The product of its digits is 164640, while the sum is 45.

The square root of 1675721718 is about 40935.5800984913. The cubic root of 1675721718 is about 1187.7744147054.

The spelling of 1675721718 in words is "one billion, six hundred seventy-five million, seven hundred twenty-one thousand, seven hundred eighteen".