38461374555509 has 2 divisors, whose sum is σ = 38461374555510. Its totient is φ = 38461374555508.

The previous prime is 38461374555481. The next prime is 38461374555547. The reversal of 38461374555509 is 90555547316483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32020285870609 + 6441088684900 = 5658647^2 + 2537930^2 .

It is a cyclic number.

It is not a de Polignac number, because 38461374555509 - 2²⁸ = 38461106120053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38461374555559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19230687277754 + 19230687277755.

It is an arithmetic number, because the mean of its divisors is an integer number (19230687277755).

Almost surely, 2^{38461374555509} is an apocalyptic number.

It is an amenable number.

38461374555509 is a deficient number, since it is larger than the sum of its proper divisors (1).

38461374555509 is an equidigital number, since it uses as much as digits as its factorization.

38461374555509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160000, while the sum is 65.

The spelling of 38461374555509 in words is "thirty-eight trillion, four hundred sixty-one billion, three hundred seventy-four million, five hundred fifty-five thousand, five hundred nine".