19484851078656 has 120 divisors (see below), whose sum is σ = 59194315528920. Its totient is φ = 6153110839296.

The previous prime is 19484851078643. The next prime is 19484851078681. The reversal of 19484851078656 is 65687015848491.

It is a happy number.

19484851078656 is a `hidden beast` number, since 1 + 9 + 4 + 8 + 48 + 510 + 7 + 8 + 65 + 6 = 666.

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

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, 111188325 + ... + 111363428.

It is an arithmetic number, because the mean of its divisors is an integer number (493285962741).

Almost surely, 2^{19484851078656} is an apocalyptic number.

19484851078656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19484851078656 is an abundant number, since it is smaller than the sum of its proper divisors (39709464450264).

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

19484851078656 is a wasteful number, since it uses less digits than its factorization.

19484851078656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222551796 (or 222551777 counting only the distinct ones).

The product of its (nonzero) digits is 464486400, while the sum is 72.

The spelling of 19484851078656 in words is "nineteen trillion, four hundred eighty-four billion, eight hundred fifty-one million, seventy-eight thousand, six hundred fifty-six".