71804709813420 has 36 divisors (see below), whose sum is σ = 217807619767920. Its totient is φ = 19147922616864.

The previous prime is 71804709813407. The next prime is 71804709813427. The reversal of 71804709813420 is 2431890740817.

71804709813420 is a `hidden beast` number, since 7 + 1 + 80 + 47 + 0 + 98 + 13 + 420 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (71804709813427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199457527080 + ... + 199457527439.

It is an arithmetic number, because the mean of its divisors is an integer number (6050211660220).

Almost surely, 2^{71804709813420} is an apocalyptic number.

It is an amenable number.

71804709813420 is an abundant number, since it is smaller than the sum of its proper divisors (146002909954500).

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

71804709813420 is a wasteful number, since it uses less digits than its factorization.

71804709813420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398915054534 (or 398915054529 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 71804709813420 in words is "seventy-one trillion, eight hundred four billion, seven hundred nine million, eight hundred thirteen thousand, four hundred twenty".