2574677981 has 2 divisors, whose sum is σ = 2574677982. Its totient is φ = 2574677980.

The previous prime is 2574677947. The next prime is 2574678037. The reversal of 2574677981 is 1897764752.

It is an a-pointer prime, because the next prime (2574678037) can be obtained adding 2574677981 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2574649081 + 28900 = 50741^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 2574677981 - 2¹⁴ = 2574661597 is a prime.

It is a super-2 number, since 2×2574677981² = 13257933411692472722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2574677921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1287338990 + 1287338991.

It is an arithmetic number, because the mean of its divisors is an integer number (1287338991).

Almost surely, 2^2574677981 is an apocalyptic number.

It is an amenable number.

2574677981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2574677981 is an equidigital number, since it uses as much as digits as its factorization.

2574677981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5927040, while the sum is 56.

The square root of 2574677981 is about 50741.2847787677. The cubic root of 2574677981 is about 1370.5902550067.

The spelling of 2574677981 in words is "two billion, five hundred seventy-four million, six hundred seventy-seven thousand, nine hundred eighty-one".