4974952781 has 8 divisors (see below), whose sum is σ = 5032533240. Its totient is φ = 4917500928.

The previous prime is 4974952769. The next prime is 4974952817. The reversal of 4974952781 is 1872594794.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1225350025 + 3749602756 = 35005^2 + 61234^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4974952781 is a prime.

It is a super-2 number, since 2×4974952781² = 49500310346359267922, 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 (4974952711) 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, 46775 + ... + 110171.

It is an arithmetic number, because the mean of its divisors is an integer number (629066655).

Almost surely, 2^4974952781 is an apocalyptic number.

It is an amenable number.

4974952781 is a deficient number, since it is larger than the sum of its proper divisors (57580459).

4974952781 is an equidigital number, since it uses as much as digits as its factorization.

4974952781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64303.

The product of its digits is 5080320, while the sum is 56.

The square root of 4974952781 is about 70533.3451709190. The cubic root of 4974952781 is about 1707.1158226685.

The spelling of 4974952781 in words is "four billion, nine hundred seventy-four million, nine hundred fifty-two thousand, seven hundred eighty-one".