38840661919 has 2 divisors, whose sum is σ = 38840661920. Its totient is φ = 38840661918.

The previous prime is 38840661817. The next prime is 38840661947. The reversal of 38840661919 is 91916604883.

It is a strong prime.

It is an emirp because it is prime and its reverse (91916604883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38840661919 - 2¹⁹ = 38840137631 is a prime.

It is a super-2 number, since 2×38840661919² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38840661919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38840661619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19420330959 + 19420330960.

It is an arithmetic number, because the mean of its divisors is an integer number (19420330960).

Almost surely, 2^38840661919 is an apocalyptic number.

38840661919 is a deficient number, since it is larger than the sum of its proper divisors (1).

38840661919 is an equidigital number, since it uses as much as digits as its factorization.

38840661919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 38840661919 in words is "thirty-eight billion, eight hundred forty million, six hundred sixty-one thousand, nine hundred nineteen".