2638746109 has 2 divisors, whose sum is σ = 2638746110. Its totient is φ = 2638746108.

The previous prime is 2638746091. The next prime is 2638746119. The reversal of 2638746109 is 9016478362.

2638746109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (2638746091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2457978084 + 180768025 = 49578^2 + 13445^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638746109 - 2²¹ = 2636648957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638746119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319373054 + 1319373055.

It is an arithmetic number, because the mean of its divisors is an integer number (1319373055).

Almost surely, 2^2638746109 is an apocalyptic number.

It is an amenable number.

2638746109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638746109 is an equidigital number, since it uses as much as digits as its factorization.

2638746109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 2638746109 is about 51368.7269552205. The cubic root of 2638746109 is about 1381.8658003032.

The spelling of 2638746109 in words is "two billion, six hundred thirty-eight million, seven hundred forty-six thousand, one hundred nine".