7147180681 has 9 divisors (see below), whose sum is σ = 7593860821. Its totient is φ = 6725405632.

The previous prime is 7147180673. The next prime is 7147180687. The reversal of 7147180681 is 1860817417.

The square root of 7147180681 is 84541.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1331593081 + 5815587600 = 36491^2 + 76260^2 .

It is not a de Polignac number, because 7147180681 - 2³ = 7147180673 is a prime.

It is a super-2 number, since 2×7147180681² (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 (7147180687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1434711 + ... + 1439683.

Almost surely, 2^7147180681 is an apocalyptic number.

7147180681 is the 84541-st square number.

7147180681 is the 42271-st centered octagonal number.

It is an amenable number.

7147180681 is a deficient number, since it is larger than the sum of its proper divisors (446680140).

7147180681 is an frugal number, since it uses more digits than its factorization.

7147180681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9980 (or 4990 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 43.

The cubic root of 7147180681 is about 1926.2452778931.

The spelling of 7147180681 in words is "seven billion, one hundred forty-seven million, one hundred eighty thousand, six hundred eighty-one".