7081603981 has 8 divisors (see below), whose sum is σ = 7468109600. Its totient is φ = 6696477360.

The previous prime is 7081603979. The next prime is 7081603987. The reversal of 7081603981 is 1893061807.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7081603981 - 2¹ = 7081603979 is a prime.

It is a super-2 number, since 2×7081603981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7081603987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334191 + ... + 354748.

It is an arithmetic number, because the mean of its divisors is an integer number (933513700).

Almost surely, 2^7081603981 is an apocalyptic number.

It is an amenable number.

7081603981 is a deficient number, since it is larger than the sum of its proper divisors (386505619).

7081603981 is a wasteful number, since it uses less digits than its factorization.

7081603981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689499.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 7081603981 is about 84152.2666420816. The cubic root of 7081603981 is about 1920.3359493342.

The spelling of 7081603981 in words is "seven billion, eighty-one million, six hundred three thousand, nine hundred eighty-one".