4963686781 has 4 divisors (see below), whose sum is σ = 4963980700. Its totient is φ = 4963392864.

The previous prime is 4963686769. The next prime is 4963686823. The reversal of 4963686781 is 1876863694.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2997562500 + 1966124281 = 54750^2 + 44341^2 .

It is a cyclic number.

It is not a de Polignac number, because 4963686781 - 2²⁷ = 4829469053 is a prime.

It is a super-2 number, since 2×4963686781² = 49276372919748283922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4963686731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119976 + ... + 155953.

It is an arithmetic number, because the mean of its divisors is an integer number (1240995175).

Almost surely, 2^4963686781 is an apocalyptic number.

It is an amenable number.

4963686781 is a deficient number, since it is larger than the sum of its proper divisors (293919).

4963686781 is a wasteful number, since it uses less digits than its factorization.

4963686781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293918.

The product of its digits is 10450944, while the sum is 58.

The square root of 4963686781 is about 70453.4369708107. The cubic root of 4963686781 is about 1705.8262357109.

The spelling of 4963686781 in words is "four billion, nine hundred sixty-three million, six hundred eighty-six thousand, seven hundred eighty-one".