19770997854816 has 192 divisors, whose sum is σ = 65369696716800. Its totient is φ = 5763205790208.

The previous prime is 19770997854781. The next prime is 19770997854823. The reversal of 19770997854816 is 61845879907791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46108656 + ... + 46535471.

It is an arithmetic number, because the mean of its divisors is an integer number (340467170400).

Almost surely, 2^{19770997854816} is an apocalyptic number.

19770997854816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19770997854816 is an abundant number, since it is smaller than the sum of its proper divisors (45598698861984).

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

19770997854816 is a wasteful number, since it uses less digits than its factorization.

19770997854816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92644178 (or 92644164 counting only the distinct ones).

The product of its (nonzero) digits is 1920360960, while the sum is 81.

The spelling of 19770997854816 in words is "nineteen trillion, seven hundred seventy billion, nine hundred ninety-seven million, eight hundred fifty-four thousand, eight hundred sixteen".