20164015777056 has 48 divisors (see below), whose sum is σ = 54755732505600. Its totient is φ = 6489568295168.

The previous prime is 20164015777007. The next prime is 20164015777069. The reversal of 20164015777056 is 65077751046102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 3621408096 + ... + 3621413663.

It is an arithmetic number, because the mean of its divisors is an integer number (1140744427200).

Almost surely, 2^{20164015777056} is an apocalyptic number.

It is an amenable number.

20164015777056 is an abundant number, since it is smaller than the sum of its proper divisors (34591716728544).

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

20164015777056 is a wasteful number, since it uses less digits than its factorization.

20164015777056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242821801 (or 7242821793 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 20164015777056 in words is "twenty trillion, one hundred sixty-four billion, fifteen million, seven hundred seventy-seven thousand, fifty-six".