7083857681 has 8 divisors (see below), whose sum is σ = 7324146600. Its totient is φ = 6846139008.

The previous prime is 7083857657. The next prime is 7083857743. The reversal of 7083857681 is 1867583807.

It can be written as a sum of positive squares in 4 ways, for example, as 3134992081 + 3948865600 = 55991^2 + 62840^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-7083857681 is a prime.

It is a super-2 number, since 2×7083857681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7083857611) 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, 636956 + ... + 647981.

It is an arithmetic number, because the mean of its divisors is an integer number (915518325).

Almost surely, 2^7083857681 is an apocalyptic number.

It is an amenable number.

7083857681 is a deficient number, since it is larger than the sum of its proper divisors (240288919).

7083857681 is a wasteful number, since it uses less digits than its factorization.

7083857681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285123.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The square root of 7083857681 is about 84165.6561846933. The cubic root of 7083857681 is about 1920.5396415162.

The spelling of 7083857681 in words is "seven billion, eighty-three million, eight hundred fifty-seven thousand, six hundred eighty-one".