102605907820 has 48 divisors (see below), whose sum is σ = 235510638048. Its totient is φ = 37319800320.

The previous prime is 102605907793. The next prime is 102605907827. The reversal of 102605907820 is 28709506201.

It is not an unprimeable number, because it can be changed into a prime (102605907827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2927641 + ... + 2962480.

It is an arithmetic number, because the mean of its divisors is an integer number (4906471626).

Almost surely, 2^102605907820 is an apocalyptic number.

102605907820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102605907820 is an abundant number, since it is smaller than the sum of its proper divisors (132904730228).

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

102605907820 is a wasteful number, since it uses less digits than its factorization.

102605907820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5890210 (or 5890208 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 102605907820 in words is "one hundred two billion, six hundred five million, nine hundred seven thousand, eight hundred twenty".