2047655797920 has 144 divisors (see below), whose sum is σ = 7007422122792. Its totient is φ = 544494551040.

The previous prime is 2047655797909. The next prime is 2047655797937. The reversal of 2047655797920 is 297975567402.

2047655797920 is a `hidden beast` number, since 2 + 0 + 4 + 7 + 6 + 557 + 9 + 79 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1606191230736 + 441464567184 = 1267356^2 + 664428^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1505821 + ... + 2522460.

Almost surely, 2^{2047655797920} is an apocalyptic number.

2047655797920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2047655797920 is an abundant number, since it is smaller than the sum of its proper divisors (4959766324872).

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

2047655797920 is a wasteful number, since it uses less digits than its factorization.

2047655797920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028655 (or 4028644 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 63.

The spelling of 2047655797920 in words is "two trillion, forty-seven billion, six hundred fifty-five million, seven hundred ninety-seven thousand, nine hundred twenty".