73785681 has 16 divisors (see below), whose sum is σ = 109673920. Its totient is φ = 49027680.

The previous prime is 73785653. The next prime is 73785689. The reversal of 73785681 is 18658737.

It is not a de Polignac number, because 73785681 - 2⁶ = 73785617 is a prime.

It is a super-2 number, since 2×73785681² = 10888653441267522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73785689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4086 + ... + 12816.

It is an arithmetic number, because the mean of its divisors is an integer number (6854620).

Almost surely, 2^73785681 is an apocalyptic number.

It is an amenable number.

73785681 is a deficient number, since it is larger than the sum of its proper divisors (35888239).

73785681 is a wasteful number, since it uses less digits than its factorization.

73785681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9053 (or 9047 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 73785681 is about 8589.8591955864. The cubic root of 73785681 is about 419.4279456861.

The spelling of 73785681 in words is "seventy-three million, seven hundred eighty-five thousand, six hundred eighty-one".