2685838647820 has 24 divisors (see below), whose sum is σ = 5651564310000. Its totient is φ = 1072182478272.

The previous prime is 2685838647761. The next prime is 2685838647887. The reversal of 2685838647820 is 287468385862.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134551075 + ... + 134571034.

It is an arithmetic number, because the mean of its divisors is an integer number (235481846250).

Almost surely, 2^{2685838647820} is an apocalyptic number.

2685838647820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2685838647820 is an abundant number, since it is smaller than the sum of its proper divisors (2965725662180).

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

2685838647820 is a wasteful number, since it uses less digits than its factorization.

2685838647820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269122617 (or 269122615 counting only the distinct ones).

The product of its (nonzero) digits is 247726080, while the sum is 67.

The spelling of 2685838647820 in words is "two trillion, six hundred eighty-five billion, eight hundred thirty-eight million, six hundred forty-seven thousand, eight hundred twenty".