19494256597056 has 42 divisors (see below), whose sum is σ = 55876766740782. Its totient is φ = 6498085532160.

The previous prime is 19494256597019. The next prime is 19494256597213. The reversal of 19494256597056 is 65079565249491.

19494256597056 is a `hidden beast` number, since 1 + 9 + 4 + 9 + 4 + 2 + 565 + 9 + 7 + 0 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17211014715456 + 2283241881600 = 4148616^2 + 1511040^2 .

It is a super-3 number, since 3×19494256597056³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16922097165 + ... + 16922098316.

Almost surely, 2^{19494256597056} is an apocalyptic number.

19494256597056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19494256597056 is an abundant number, since it is smaller than the sum of its proper divisors (36382510143726).

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

19494256597056 is a wasteful number, since it uses less digits than its factorization.

19494256597056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33844195499 (or 33844195486 counting only the distinct ones).

The product of its (nonzero) digits is 734832000, while the sum is 72.

The spelling of 19494256597056 in words is "nineteen trillion, four hundred ninety-four billion, two hundred fifty-six million, five hundred ninety-seven thousand, fifty-six".