8142720521040 has 200 divisors, whose sum is σ = 32320999835520. Its totient is φ = 1861193251584.

The previous prime is 8142720520967. The next prime is 8142720521063. The reversal of 8142720521040 is 401250272418.

8142720521040 is a `hidden beast` number, since 8 + 1 + 427 + 205 + 21 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8142720520986 and 8142720521004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 89711260 + ... + 89801979.

Almost surely, 2^{8142720521040} is an apocalyptic number.

8142720521040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8142720521040 is an abundant number, since it is smaller than the sum of its proper divisors (24178279314480).

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

8142720521040 is a wasteful number, since it uses less digits than its factorization.

8142720521040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179513271 (or 179513256 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

Adding to 8142720521040 its reverse (401250272418), we get a palindrome (8543970793458).

The spelling of 8142720521040 in words is "eight trillion, one hundred forty-two billion, seven hundred twenty million, five hundred twenty-one thousand, forty".