820600684608 has 56 divisors (see below), whose sum is σ = 2171242393600. Its totient is φ = 273524774400.

The previous prime is 820600684601. The next prime is 820600684613. The reversal of 820600684608 is 806486006028.

It is a happy number.

It is a super-2 number, since 2×820600684608² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (820600684601) 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, 9113793 + ... + 9203391.

It is an arithmetic number, because the mean of its divisors is an integer number (38772185600).

Almost surely, 2^820600684608 is an apocalyptic number.

It is an amenable number.

820600684608 is an abundant number, since it is smaller than the sum of its proper divisors (1350641708992).

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

820600684608 is a wasteful number, since it uses less digits than its factorization.

820600684608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137315 (or 137305 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 820600684608 in words is "eight hundred twenty billion, six hundred million, six hundred eighty-four thousand, six hundred eight".