5787421720065 has 80 divisors (see below), whose sum is σ = 10694497579920. Its totient is φ = 2992036216320.

The previous prime is 5787421720001. The next prime is 5787421720109. The reversal of 5787421720065 is 5600271247875.

5787421720065 is a `hidden beast` number, since 5 + 7 + 8 + 7 + 421 + 7 + 200 + 6 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 731763906624 + 5055657813441 = 855432^2 + 2248479^2 .

It is not a de Polignac number, because 5787421720065 - 2⁶ = 5787421720001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5787421719993 and 5787421720020.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3313095 + ... + 4748835.

It is an arithmetic number, because the mean of its divisors is an integer number (133681219749).

Almost surely, 2^{5787421720065} is an apocalyptic number.

It is an amenable number.

5787421720065 is a deficient number, since it is larger than the sum of its proper divisors (4907075859855).

5787421720065 is a wasteful number, since it uses less digits than its factorization.

5787421720065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436064 (or 1436055 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 54.

The spelling of 5787421720065 in words is "five trillion, seven hundred eighty-seven billion, four hundred twenty-one million, seven hundred twenty thousand, sixty-five".