2656471644820 has 24 divisors (see below), whose sum is σ = 6375531947904. Its totient is φ = 910790278176.

The previous prime is 2656471644809. The next prime is 2656471644821. The reversal of 2656471644820 is 284461746562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656471644821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9487398592 + ... + 9487398871.

It is an arithmetic number, because the mean of its divisors is an integer number (265647164496).

Almost surely, 2^{2656471644820} is an apocalyptic number.

2656471644820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2656471644820 is an abundant number, since it is smaller than the sum of its proper divisors (3719060303084).

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

2656471644820 is a wasteful number, since it uses less digits than its factorization.

2656471644820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18974797479 (or 18974797477 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 55.

The spelling of 2656471644820 in words is "two trillion, six hundred fifty-six billion, four hundred seventy-one million, six hundred forty-four thousand, eight hundred twenty".