820001335548 has 24 divisors (see below), whose sum is σ = 1913353500240. Its totient is φ = 273331342720.

The previous prime is 820001335547. The next prime is 820001335553. The reversal of 820001335548 is 845533100028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820001335541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550038 + ... + 2010626.

It is an arithmetic number, because the mean of its divisors is an integer number (79723062510).

Almost surely, 2^820001335548 is an apocalyptic number.

It is an amenable number.

820001335548 is an abundant number, since it is smaller than the sum of its proper divisors (1093352164692).

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

820001335548 is a wasteful number, since it uses less digits than its factorization.

820001335548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608957 (or 608955 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 820001335548 in words is "eight hundred twenty billion, one million, three hundred thirty-five thousand, five hundred forty-eight".