55738209791808 has 84 divisors (see below), whose sum is σ = 162382588635748. Its totient is φ = 18274822871040.

The previous prime is 55738209791807. The next prime is 55738209791809. The reversal of 55738209791808 is 80819790283755.

55738209791808 is a `hidden beast` number, since 557 + 38 + 20 + 9 + 7 + 9 + 18 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (55738209791807) and next prime (55738209791809).

It can be written as a sum of positive squares in 2 ways, for example, as 1556126512704 + 54182083279104 = 1247448^2 + 7360848^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55738209791807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 793142941 + ... + 793213212.

Almost surely, 2^{55738209791808} is an apocalyptic number.

It is an amenable number.

55738209791808 is an abundant number, since it is smaller than the sum of its proper divisors (106644378843940).

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

55738209791808 is a wasteful number, since it uses less digits than its factorization.

55738209791808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586356232 (or 1586356219 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 72.

The spelling of 55738209791808 in words is "fifty-five trillion, seven hundred thirty-eight billion, two hundred nine million, seven hundred ninety-one thousand, eight hundred eight".