500538778387 has 2 divisors, whose sum is σ = 500538778388. Its totient is φ = 500538778386.

The previous prime is 500538778339. The next prime is 500538778391. The reversal of 500538778387 is 783877835005.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-500538778387 is a prime.

It is not a weakly prime, because it can be changed into another prime (500538478387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250269389193 + 250269389194.

It is an arithmetic number, because the mean of its divisors is an integer number (250269389194).

Almost surely, 2^500538778387 is an apocalyptic number.

500538778387 is a deficient number, since it is larger than the sum of its proper divisors (1).

500538778387 is an equidigital number, since it uses as much as digits as its factorization.

500538778387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39513600, while the sum is 61.

The spelling of 500538778387 in words is "five hundred billion, five hundred thirty-eight million, seven hundred seventy-eight thousand, three hundred eighty-seven".