38777545397 has 2 divisors, whose sum is σ = 38777545398. Its totient is φ = 38777545396.

The previous prime is 38777545361. The next prime is 38777545403. The reversal of 38777545397 is 79354577783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30208525636 + 8569019761 = 173806^2 + 92569^2 .

It is a cyclic number.

It is not a de Polignac number, because 38777545397 - 2⁶ = 38777545333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38777545337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19388772698 + 19388772699.

It is an arithmetic number, because the mean of its divisors is an integer number (19388772699).

Almost surely, 2^38777545397 is an apocalyptic number.

It is an amenable number.

38777545397 is a deficient number, since it is larger than the sum of its proper divisors (1).

38777545397 is an equidigital number, since it uses as much as digits as its factorization.

38777545397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155584800, while the sum is 65.

The spelling of 38777545397 in words is "thirty-eight billion, seven hundred seventy-seven million, five hundred forty-five thousand, three hundred ninety-seven".