4718401981 has 2 divisors, whose sum is σ = 4718401982. Its totient is φ = 4718401980.

The previous prime is 4718401967. The next prime is 4718402081. The reversal of 4718401981 is 1891048174.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4677876025 + 40525956 = 68395^2 + 6366^2 .

It is a cyclic number.

It is not a de Polignac number, because 4718401981 - 2¹⁵ = 4718369213 is a prime.

It is a super-2 number, since 2×4718401981² = 44526634508609448722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4718401781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2359200990 + 2359200991.

It is an arithmetic number, because the mean of its divisors is an integer number (2359200991).

Almost surely, 2^4718401981 is an apocalyptic number.

It is an amenable number.

4718401981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4718401981 is an equidigital number, since it uses as much as digits as its factorization.

4718401981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 4718401981 is about 68690.6251318184. The cubic root of 4718401981 is about 1677.2519772228.

The spelling of 4718401981 in words is "four billion, seven hundred eighteen million, four hundred one thousand, nine hundred eighty-one".