2638774141 has 2 divisors, whose sum is σ = 2638774142. Its totient is φ = 2638774140.

The previous prime is 2638774121. The next prime is 2638774189. The reversal of 2638774141 is 1414778362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2575968516 + 62805625 = 50754^2 + 7925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638774141 - 2⁷ = 2638774013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638774111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319387070 + 1319387071.

It is an arithmetic number, because the mean of its divisors is an integer number (1319387071).

Almost surely, 2^2638774141 is an apocalyptic number.

It is an amenable number.

2638774141 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638774141 is an equidigital number, since it uses as much as digits as its factorization.

2638774141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 43.

The square root of 2638774141 is about 51368.9998053301. Note that the first 3 decimals coincide. The cubic root of 2638774141 is about 1381.8706935774.

The spelling of 2638774141 in words is "two billion, six hundred thirty-eight million, seven hundred seventy-four thousand, one hundred forty-one".