7190018681 has 2 divisors, whose sum is σ = 7190018682. Its totient is φ = 7190018680.

The previous prime is 7190018663. The next prime is 7190018701. The reversal of 7190018681 is 1868100917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7122516025 + 67502656 = 84395^2 + 8216^2 .

It is a cyclic number.

It is not a de Polignac number, because 7190018681 - 2¹⁸ = 7189756537 is a prime.

It is a super-2 number, since 2×7190018681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7190018651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3595009340 + 3595009341.

It is an arithmetic number, because the mean of its divisors is an integer number (3595009341).

Almost surely, 2^7190018681 is an apocalyptic number.

It is an amenable number.

7190018681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7190018681 is an equidigital number, since it uses as much as digits as its factorization.

7190018681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 41.

The square root of 7190018681 is about 84793.9778581003. The cubic root of 7190018681 is about 1930.0860549385.

The spelling of 7190018681 in words is "seven billion, one hundred ninety million, eighteen thousand, six hundred eighty-one".