1938905164550 has 24 divisors (see below), whose sum is σ = 3606439076400. Its totient is φ = 775545835680.

The previous prime is 1938905164523. The next prime is 1938905164577. The reversal of 1938905164550 is 554615098391.

It is an interprime number because it is at equal distance from previous prime (1938905164523) and next prime (1938905164577).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2169191 + ... + 2929709.

It is an arithmetic number, because the mean of its divisors is an integer number (150268294850).

Almost surely, 2^{1938905164550} is an apocalyptic number.

1938905164550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1938905164550 is a deficient number, since it is larger than the sum of its proper divisors (1667533911850).

1938905164550 is a wasteful number, since it uses less digits than its factorization.

1938905164550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811520 (or 811515 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 56.

The spelling of 1938905164550 in words is "one trillion, nine hundred thirty-eight billion, nine hundred five million, one hundred sixty-four thousand, five hundred fifty".