1819953494136 has 96 divisors (see below), whose sum is σ = 5113888940160. Its totient is φ = 606379247712.

The previous prime is 1819953494119. The next prime is 1819953494153. The reversal of 1819953494136 is 6314943599181.

1819953494136 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 9 + 5 + 3 + 494 + 136 = 666.

It is an interprime number because it is at equal distance from previous prime (1819953494119) and next prime (1819953494153).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4151701 + ... + 4569083.

It is an arithmetic number, because the mean of its divisors is an integer number (53269676460).

Almost surely, 2^{1819953494136} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819953494136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2556944470080).

1819953494136 is an abundant number, since it is smaller than the sum of its proper divisors (3293935446024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1819953494136 is a wasteful number, since it uses less digits than its factorization.

1819953494136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419647 (or 419631 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The spelling of 1819953494136 in words is "one trillion, eight hundred nineteen billion, nine hundred fifty-three million, four hundred ninety-four thousand, one hundred thirty-six".